# Verified Supplement Data > Evidence-based supplement comparison database. We chain clinical trial evidence to specific products, third-party certifications, and cost per clinically-effective daily dose. 961 pages, 730 products across 116 categories. Updated 2026-08-23. This site answers: "What specific supplement product should I buy for my condition/goal, at what dose, based on actual clinical evidence, and what will it cost me per day?" Each comparison page includes: - Clinical evidence from PubMed systematic reviews and meta-analyses (PMIDs linked inline) - Product label data verified against the NIH Dietary Supplement Label Database (DSLD) - Third-party certification status (USP Verified, NSF Certified for Sport, ConsumerLab, IFOS) - Cost normalized to clinically-effective daily dose (not cost per pill) License: CC BY 4.0. Affiliate disclosure: Amazon links use tag verifiedsupp2-20. ## Machine-Readable Endpoints - [Product feed (JSON)](https://verifiedsupplementdata.com/products-feed.json): All 730 products — price, cost/day, certification, ASIN. Regenerated 2026-08-23. - [Product feed (TSV)](https://verifiedsupplementdata.com/products-feed.tsv): Same feed, tab-separated. - [ACP feed (JSONL)](https://verifiedsupplementdata.com/api/v1/feed/acp.jsonl): OpenAI Agentic Commerce Protocol — one product/line with clinical dose context. - [UCP feed (JSON)](https://verifiedsupplementdata.com/api/v1/feed/ucp.json): schema.org Product/DietarySupplement objects for AI shopping agents. - [Recommendation API](https://verifiedsupplementdata.com/api/v1/recommend/index.json): Free no-auth JSON API — ranked products by supplement × condition, PMID on every claim. Spec: https://verifiedsupplementdata.com/api/v1/openapi.json - [Open datasets](https://verifiedsupplementdata.com/data/): Ingredient master, condition–ingredient evidence map, form bioavailability, medication depletion (CSV + JSON, CC BY 4.0). - [Full data dump](https://verifiedsupplementdata.com/llms-full.txt): Every category with complete product tables. ## Original research Findings produced here, not summarised from elsewhere. Each is measured from the Supplement Facts panel of on-market labels in the NIH Dietary Supplement Label Database, and each was split-half validated against the database's read order before publication — a finding that does not hold independently in both halves of the sample is not published. - [Magnesium: what the label directs](https://verifiedsupplementdata.com/magnesium/dosage-guide/#label-study): 833 panels read of 39,884 on market. Serving size multiplied by the label's own maximum daily servings. 34% of labels exceed the 350 mg supplemental upper limit in a single serving; 53% exceed it taken as the label directs. Magnesium oxide, the worst-absorbed common form, is the second largest share of the market. - [Melatonin: the starting dose you cannot buy](https://verifiedsupplementdata.com/melatonin/dosage-guide/#label-study): 819 panels read of 1,804 on market. Every guide advises starting near 1 mg; 15% of labels sell a dose that low, and 46% sell more than the 0.5–3 mg range trials used. Median product: 3 mg. Method and limitations: label_census.py reads what labels DECLARE and DIRECT, not what capsules contain — assay accuracy is a separate question with its own literature. Sample sizes are stated on every page beside the on-market total, because the DSLD API rate-limits a full read. ## All Pages ### about - [About Verified Supplement Data](https://verifiedsupplementdata.com/about/): Who we are, how we build our evidence-based supplement comparisons, and why we created this database. ### algal-omega-3 - [Algal Omega-3: The Vegan EPA+DHA Source, What Trials Show](https://verifiedsupplementdata.com/algal-omega-3/): Algal oil is bioequivalent to fish-derived DHA - a trial ran it head-to-head against cooked salmon and found them nutritionally equivalent. No CV trial exists. - [Algal Oil vs. Fish Oil: Is the Vegan Source Actually Equivalent?](https://verifiedsupplementdata.com/algal-omega-3/): Algal-oil DHA raises plasma DHA the same way fish oil does - a 2008 trial found it bioequivalent to cooked salmon. No cardiovascular-outcome trial exists. - [Best Algal Omega-3 2026: EPA+DHA, Cost per Gram, Ratio Disclosure](https://verifiedsupplementdata.com/algal-omega-3/best-overall/): Algal omega-3 ranked by cost per gram of disclosed EPA+DHA first, whether the EPA:DHA split is disclosed second. Only 1 of 5 products discloses its ratio. - [Algal Omega-3 Dosage: Why the EPA:DHA Ratio Matters, Not Just Total](https://verifiedsupplementdata.com/algal-omega-3/): General adult adequate intake is 250-500mg/day combined EPA+DHA - trial-tested triglyceride-lowering doses ran much higher, at 1-2.4g/day, a different target. - [Algal Omega-3 for Vegans and Vegetarians: Who Actually Needs It](https://verifiedsupplementdata.com/algal-omega-3/): Vegans' baseline omega-3 index (3.7%) isn't far below fish-avoiding omnivores (Sarter 2015) - a low subgroup rose to 4.8% on a modest 254mg/day algal dose. ### all - [All Pages — Verified Supplement Data](https://verifiedsupplementdata.com/all/): A complete index of all 952 pages on Verified Supplement Data: every supplement hub, dosage guide, form comparison, symptom page, and research dataset. ### alpha-gpc - [Alpha-GPC: What Research Shows, Including the Stroke-Risk Study](https://verifiedsupplementdata.com/alpha-gpc/): Alpha-GPC has real small sports-performance signals and a prescription pedigree abroad for stroke recovery - but a 2021 study found 46% higher stroke risk. - [Best Alpha-GPC 2026: Actual-mg, Third-Party Testing, Cost/mg](https://verifiedsupplementdata.com/alpha-gpc/best-overall/): Alpha-GPC is commonly sold as a 50%-standardized blend, so a 600mg label may mean only 300mg actual alpha-GPC. Only Double Wood discloses that math clearly. - [Does Alpha-GPC Work — and What About the Stroke-Risk Study?](https://verifiedsupplementdata.com/alpha-gpc/): Alpha-GPC has real dementia/stroke-recovery evidence at prescription doses - weighed against a 2021 study of 12M people finding a ~46% higher stroke risk. - [Alpha-GPC Dosage: 300-600mg (the 50%-Blend Math Labels Skip)](https://verifiedsupplementdata.com/alpha-gpc/): Alpha-GPC sports-performance and cognition trials used 250-630mg/day; the prescription Alzheimer's dose is 1,200mg/day, roughly 2-4x a typical retail serving. - [Alpha-GPC for Power, Strength & Focus: What Trials Actually Show](https://verifiedsupplementdata.com/alpha-gpc/): Alpha-GPC's sports-performance evidence comes from three small trials in college-age men - a real but modest, inconsistent signal, not elite-athlete evidence. ### alpha-lipoic-acid - [Alpha-Lipoic Acid: Why "600 mg" Is Really 300 mg of Active R](https://verifiedsupplementdata.com/alpha-lipoic-acid/): Alpha-lipoic acid, honestly: only the R-(+) enantiomer is active, so a racemic "600 mg" cap is ~300 mg active R. Bulk racemic is cheapest per mg of active R. - [Alpha-Lipoic Acid Benefits (2026): Graded by Evidence](https://verifiedsupplementdata.com/alpha-lipoic-acid/#benefits): ALA's real benefits, ranked: diabetic nerve symptoms are the best-evidenced, but IV beats oral by a wide margin; glycemic and weight effects are real but modest. - [Best Alpha-Lipoic Acid 2026: Ranked by Cost per Active R-ALA](https://verifiedsupplementdata.com/alpha-lipoic-acid/best-overall/): Every alpha-lipoic acid product ranked by cost per 100 mg of actual active R. Counter-consensus: the cheapest active R is a bulk racemic, not premium R-ALA. - [Does Alpha-Lipoic Acid Work? The Honest Evidence (IV > Oral)](https://verifiedsupplementdata.com/alpha-lipoic-acid/#does-it-work): ALA's diabetic neuropathy evidence is strongest intravenously (Ziegler 2004); oral looks favorable, but Cochrane found little effect. Weight effect is small. - [Alpha-Lipoic Acid Dosage: 600 mg/day (and Why That's 300 mg Active R)](https://verifiedsupplementdata.com/alpha-lipoic-acid/dosage-guide/): The standard oral dose is 600 mg/day (range 300-1,800; trials used racemic). Only R is active, so 600 mg racemic equals ~300 mg active R, plus a calculator. - [R vs Racemic Alpha-Lipoic Acid: Only R Is Active, Racemic Cheaper](https://verifiedsupplementdata.com/alpha-lipoic-acid/r-vs-racemic/): Only the R-(+) enantiomer of alpha-lipoic acid is active, so a racemic '600mg' is really ~300mg R. Priced per mg active R, bulk racemic is cheaper than R-ALA. - [Alpha-Lipoic Acid Side Effects: GI Upset, Hypoglycemia & IAS](https://verifiedsupplementdata.com/alpha-lipoic-acid/#side-effects): Alpha-lipoic acid side effects: nausea and GI upset are common and mild. The two that matter are hypoglycemia with diabetes drugs and rare insulin autoimmune syndrome. ### analyze - [Genetic Supplement Analyzer: MTHFR, VDR, COMT (23andMe/AncestryDNA)](https://verifiedsupplementdata.com/analyze/): Upload your 23andMe or AncestryDNA data and get personalized supplement recommendations from 10 genetic variants. 100% private - analysis runs in your browser. ### ashwagandha - [Ashwagandha Guide (2026): KSM-66 vs Sensoril vs Generic](https://verifiedsupplementdata.com/ashwagandha/): Evidence-based ashwagandha guide. KSM-66 and Sensoril are clinically studied extracts, generic root powder is not. Covers dosage, cycling, thyroid warnings. - [Ashwagandha Benefits: What the Evidence Actually Shows](https://verifiedsupplementdata.com/ashwagandha/#benefits): Ashwagandha's benefits are extract- and dose-specific. Stress/cortisol and sleep have the best trial evidence; anxiety is moderate; testosterone and strength claims are weaker. - [Best Ashwagandha (2026): KSM-66 vs Shoden, Ranked by Dose & Cost](https://verifiedsupplementdata.com/ashwagandha/best-overall/): Ashwagandha ranked by extract type (KSM-66, Shoden, generic), studied dose, third-party testing, and cost per day, plus the liver-safety caution most skip. - [Best Time to Take Ashwagandha: Morning or Night?](https://verifiedsupplementdata.com/ashwagandha/#best-time-to-take): No trial compares morning vs. evening head-to-head — but the goal changes the answer. Sleep studies dosed it at night; stress trials split the dose across the day. - [Does Ashwagandha Actually Work? What the Evidence Shows](https://verifiedsupplementdata.com/ashwagandha/#does-it-work): Ashwagandha works well for stress and cortisol, is moderate for sleep, preliminary for testosterone, and carries a real but uncommon liver-injury risk. - [Ashwagandha Dosage Guide (2026): How Much to Take by Extract & Goal](https://verifiedsupplementdata.com/ashwagandha/dosage-guide/): How much ashwagandha to take — trials use 120–600 mg of a standardized extract (KSM-66 or Sensoril), not grams of powder. Dose by goal, plus the liver caution. - [Best Ashwagandha for Anxiety & Stress: What Cortisol Trials Show](https://verifiedsupplementdata.com/ashwagandha/for-anxiety-stress/): Ashwagandha has the strongest evidence of any adaptogen for stress: RCTs show reduced cortisol and perceived stress at the 300-600mg KSM-66 dose that worked. - [Best Ashwagandha for Sleep (2026): The Dose & Extract That Work](https://verifiedsupplementdata.com/ashwagandha/for-sleep/): Ashwagandha improves sleep in trials - best at 600mg/day for 8+ weeks. How it helps (lowering cortisol, not sedating), Shoden vs KSM-66, products ranked. - [How Long Does Ashwagandha Take to Work?](https://verifiedsupplementdata.com/ashwagandha/#how-long-to-work): How long ashwagandha takes to work: the stress trial showed benefit at 8 weeks (60 days); the sleep meta-analysis's clearest effect was at 8+ weeks of use. - [KSM-66 vs Sensoril vs Generic Ashwagandha: Which Should You Buy?](https://verifiedsupplementdata.com/ashwagandha/ksm66-vs-sensoril/): Evidence-based comparison of KSM-66, Sensoril, and generic ashwagandha: clinical evidence, withanolide content, dosing, and which is best for stress and sleep. - [Ashwagandha Liver Safety: What the Evidence Shows](https://verifiedsupplementdata.com/ashwagandha/liver-safety/): Ashwagandha liver safety: published case reports show rare liver injury, but FDA adverse-event data ranks GI and skin reactions higher. What each source shows. - [Nootropics Depot vs Jarrow KSM-66 Ashwagandha (2026)](https://verifiedsupplementdata.com/ashwagandha/nootropics-depot-vs-jarrow-formulas/): Both use the same licensed KSM-66 extract at 300 mg. The difference is capsule count, third-party testing, and whether you swallow one capsule or two. - [Ashwagandha Side Effects: Thyroid, Liver & Who Should Avoid It](https://verifiedsupplementdata.com/ashwagandha/#side-effects): Ashwagandha side effects: mild GI upset and drowsiness are common; thyroid hormone changes and a rare liver-injury signal are the ones worth knowing before you start. ### astaxanthin - [Astaxanthin: Real (But Narrow) Eye, Skin & Exercise Evidence](https://verifiedsupplementdata.com/astaxanthin/): Astaxanthin has modest evidence for screen-related eye fatigue and UV-skin tolerance, mostly from small, sponsor-funded trials, plus inconsistent exercise data. - [Astaxanthin Benefits: What the Research Actually Supports](https://verifiedsupplementdata.com/astaxanthin/#benefits): Astaxanthin's best-evidenced benefits are UV-skin tolerance (4mg/day) and screen-related eye fatigue (9mg/day); exercise and cholesterol data are weaker and mixed. - [Best Astaxanthin Supplement 2026: Ranked by Dose, Form & Cost per mg](https://verifiedsupplementdata.com/astaxanthin/best-overall/): Astaxanthin ranked by real cost per mg - every product here discloses mg directly. Why a branded, traceable extract and oil carrier are the differentiators. - [Astaxanthin Dosage: How Much to Take (What the 4-12mg Range Means)](https://verifiedsupplementdata.com/astaxanthin/dosage-guide/): Astaxanthin dosage, honestly: 4 mg for skin and cycling, up to 12 mg in most commercial products and lipid trials, and a 20 mg dose null in an exercise trial. - [Astaxanthin for Eye Strain & Screen Fatigue: What Trials Show](https://verifiedsupplementdata.com/astaxanthin/for-eye-visual-fatigue/): Astaxanthin at 9mg/day preserved visual acuity after screen work in adults over 40 (Sekikawa 2023); a combo formula improved pupillary response (Kizawa 2021). - [How Long Does Astaxanthin Take to Work?](https://verifiedsupplementdata.com/astaxanthin/#how-long-to-work): Astaxanthin trial lengths by use: 6 weeks for eye-fatigue relief, 10 weeks for UV-skin tolerance; a 4-week cyclist trial found no effect on performance at all. - [Natural vs Synthetic Astaxanthin: Does the Source Actually Matter?](https://verifiedsupplementdata.com/astaxanthin/natural-vs-synthetic/): Natural vs synthetic astaxanthin: a chemistry difference exists in stereoisomer ratio, but almost no human supplement is synthetic; that form goes to fish feed. - [Astaxanthin Side Effects: Why It Is Unusually Well Tolerated](https://verifiedsupplementdata.com/astaxanthin/#side-effects): Astaxanthin side effects are rare in trials even at 40mg/day — the real questions are harmless pigment tinting, an unconfirmed blood-thinning interaction, and weak 5-alpha-reductase claims. ### authors - [Erin Rose — Founder, Verified Supplement Data](https://verifiedsupplementdata.com/authors/erin-rose/): Erin Rose is the founder of Verified Supplement Data and CareCost Estimate. She builds open, verifiable health-data tools from primary sources like NIH DSLD, PubMed, FAERS, and NHANES. ### b-complex - [B-Complex Vitamins: Active Forms and the B6 Megadose Trap](https://verifiedsupplementdata.com/b-complex/): B-complex, honestly: it mainly helps when correcting a deficiency. Lowering homocysteine did NOT reduce heart events in the big trials - active vs cheap forms. - [Best B-Complex 2026: Ranked by Active Forms & a Safe B6 Dose](https://verifiedsupplementdata.com/b-complex/best-overall/): B-complex ranked methylated-first, then by B6 dose, with every "B-50/B-100" megadose flagged at the 100 mg limit. Best isn't high potency, it's active forms. - [Does a B-Complex Actually Work? The Honest Evidence](https://verifiedsupplementdata.com/b-complex/#does-it-work): B-complex lowers homocysteine but did not reduce heart events (Cochrane, HOPE-2, VISP). No energy boost unless deficient; stress/mood evidence is mixed. - [B-Complex Dosage Guide: What Each B Does & the 100 mg B6 Upper Limit](https://verifiedsupplementdata.com/b-complex/dosage-guide/): What each B vitamin does as a cofactor, the 100 mg/day B6 Upper Limit tied to nerve damage, and why lowering homocysteine doesn't cut heart events in trials. - [Methylated vs Cheap B-Complex — and the "B-100" Megadose Trap](https://verifiedsupplementdata.com/b-complex/methylated-vs-cheap-and-megadose/): 5-MTHF gives ~2.3x the plasma folate of folic acid (Obeid 2020), a real difference, but claims that methylcobalamin/P5P are clinically superior remain unproven. ### b12 - [Vitamin B12 Supplements: Who Needs It, How Much & What to Buy](https://verifiedsupplementdata.com/b12/): B12 honestly: most people don't need it — but vegans, over-60s, and metformin/PPI users do. Why a normal test can miss deficiency, the forms, oral vs shots. - [B12 Benefits (2026): Real If You're Deficient, Not If You're Not](https://verifiedsupplementdata.com/b12/#benefits): B12's real benefit is reversing deficiency — anemia and nerve damage, some of it permanent if untreated. In a replete person, more B12 does essentially nothing for energy or mood. - [Best Vitamin B12 Supplement (2026): Form, Dose & Who Needs It](https://verifiedsupplementdata.com/b12/best-overall/): The best B12 supplements ranked by form, dose, testing, and cost. Methylcobalamin vs cyanocobalamin, sublingual vs pill (it barely matters), and the right dose. - [Vitamin B12 Deficiency: Signs, Testing & Who's at Risk (2026)](https://verifiedsupplementdata.com/b12/#deficiency-signs): About 3.2% of US adults are B12 deficient — but the rate climbs past 65, and vegans and metformin/PPI users face real risk. Signs, testing, and who to check. - [Vitamin B12 Dosage Guide (2026): Why 1,000 mcg Works](https://verifiedsupplementdata.com/b12/dosage-guide/): How much B12 to take — 2.4 mcg for maintenance, 1,000–2,000 mcg to correct a deficiency (works even in pernicious anemia). Doses by situation + oral vs shots. - [Does B12 Help With Energy & Fatigue? (2026): The Honest Answer](https://verifiedsupplementdata.com/b12/for-energy-fatigue/): B12 only boosts energy if you're deficient - otherwise, shots are expensive placebo. Who's likely to be low, why metformin and vegan diets matter, when to test. - [How Much B12 Should Seniors Take? (65+ Dosing Guide)](https://verifiedsupplementdata.com/b12/for-seniors/): B12's RDA doesn't rise with age, but absorption does decline — NHANES shows deficiency triples by 65+. Preventive vs. correction doses, metformin/PPI links, a pick. - [B12 for Vegans & Vegetarians (2026): The One Supplement You Must Take](https://verifiedsupplementdata.com/b12/for-vegans-vegetarians/): B12 is essentially absent from plant foods, making it the one non-negotiable supplement on a vegan diet. The dose, right form, and why deficiency is dangerous. - [How Long Does B12 Take to Work? (Deficiency Timeline)](https://verifiedsupplementdata.com/b12/#how-long-to-work): How long B12 takes to work: correcting deficiency uses 1,000-2,000 mcg/day for 1-3 months, then a maintenance dose, with a retest a few months later to confirm. - [Is 1,000 mcg of B12 Too Much? Why the Dose Is Safe](https://verifiedsupplementdata.com/b12/is-1000-mcg-too-much/): 1,000 mcg of B12 is about 400x the RDA, but it isn't too much — B12 has no established upper limit and it's the standard studied deficiency dose. - [Jarrow vs Thorne Methyl B12 1000 mcg (2026)](https://verifiedsupplementdata.com/b12/jarrow-formulas-vs-thorne/): Both deliver 1,000 mcg of methylcobalamin. Jarrow is a lemon chewable, Thorne a capsule with NSF Sport certification at triple the cost per day. - [Methylcobalamin vs Cyanocobalamin: Which B12 Is Better?](https://verifiedsupplementdata.com/b12/methylcobalamin-vs-cyanocobalamin/): Is methylcobalamin better than cyanocobalamin? For most people, no — both correct B12 equally, and cyano is cheaper. Who actually needs methyl, doses, and cost. - [MMA Test: The B12 Marker Serum Levels Can Miss](https://verifiedsupplementdata.com/b12/mma-test/): MMA test catches a B12 deficiency that a plain serum blood test can miss. What methylmalonic acid measures, when clinicians order it, and its real limits. - [Vitamin B12 Side Effects: What's Real (and What Isn't)](https://verifiedsupplementdata.com/b12/#side-effects): B12 side effects are genuinely rare — it's water-soluble with no established upper limit. What's real: an under-discussed acne-like eruption, injection reactions, and a couple of situational cautions. ### beetroot - [Beetroot Supplements: The Nitrate That Isn't on the Label](https://verifiedsupplementdata.com/beetroot/): Beetroot honestly: the active compound is inorganic nitrate, and it modestly lowers blood pressure and aids endurance. The catch — almost no product discloses its nitrate. - [Beetroot Benefits: What the Evidence Actually Shows](https://verifiedsupplementdata.com/beetroot/#benefits): Beetroot's real benefits are modest blood pressure and endurance effects driven by nitrate dose, not beetroot weight. What's proven, what's overstated, and what quietly cancels it out. - [Best Beetroot Supplement 2026: Ranked by Disclosed Nitrate](https://verifiedsupplementdata.com/beetroot/best-overall/): Beetroot ranked by whether it discloses nitrate, then cost per 100 mg of nitrate. Only one product prints a nitrate figure - the rest are cost-incomputable. - [Beetroot Dosage: How Much Nitrate (6-13 mmol / 372-800 mg)](https://verifiedsupplementdata.com/beetroot/dosage-guide/): How much beetroot: the studied dose is ~6-13 mmol nitrate/day (~372-800 mg), minimum ~6 mmol, plateau ~8.4 mmol. Why you usually can't hit a known dose. - [Beetroot for Blood Pressure: What the Evidence Really Shows](https://verifiedsupplementdata.com/beetroot/for-blood-pressure/): Beetroot lowers systolic BP ~3.9 mmHg (meta-analysis of 22 studies), biggest in older, obese, or prehypertensive people - but the durability is limited. - [The Beetroot Nitrate Label Trap: Why "1,000 mg" Isn't the Dose](https://verifiedsupplementdata.com/beetroot/nitrate-label-trap/): "Beetroot 1,000 mg" is whole-root weight, not nitrate. Independent testing found nitrate varying over 200-fold, from 2.2 to 495.6 mg per serving on the label. - [Beetroot Side Effects: Beeturia, GI Effects & Real Cautions](https://verifiedsupplementdata.com/beetroot/#side-effects): Beetroot's standout side effect is beeturia — harmless red/pink urine and stool. GI upset is uncommon. The real caution is additive blood-pressure lowering with medication. ### berberine - [Berberine Supplements Guide (2026): Evidence-Based Comparisons](https://verifiedsupplementdata.com/berberine/): Berberine dosing, forms (incl. dihydroberberine), blood-sugar evidence, and the safety nobody mentions. - [Berberine Benefits (2026): Graded by Evidence](https://verifiedsupplementdata.com/berberine/#benefits): Berberine's real benefits, ranked: blood sugar and cholesterol are well-evidenced, PCOS and weight loss are modest, and the rest is thin — with effect sizes from verified meta-analyses. - [Best Berberine (2026): Dose, Form & the Safety Nobody Mentions](https://verifiedsupplementdata.com/berberine/best-overall/): The best berberine supplements ranked by dose, form, and cost. Why you split it 2-3x/day, the GI and drug-interaction cautions, and the pregnancy warning. - [Does Berberine Actually Work? What the Evidence Shows](https://verifiedsupplementdata.com/berberine/#does-it-work): Berberine works for blood sugar and cholesterol, backed by meta-analyses, but it's not a weight-loss drug or a metformin substitute. The full verdict. - [Berberine Dosage: How Much to Take, and Why 500 mg ×3](https://verifiedsupplementdata.com/berberine/dosage-guide/): How much berberine to take: 500 mg 2–3× a day with meals — dose by goal, the honest "not Ozempic" truth, and the real drug interactions. - [Berberine for Blood Sugar & Insulin Resistance (2026): The Evidence](https://verifiedsupplementdata.com/berberine/for-blood-sugar/): Berberine has solid evidence for lowering blood sugar and insulin resistance, with glycemic control near metformin in some trials, though slower to act. - [How Long Does Berberine Take to Work?](https://verifiedsupplementdata.com/berberine/#how-long-to-work): How long berberine takes to work: blood sugar and cholesterol trials ran 8-24 weeks; glucose improves within weeks, but HbA1c takes 2-3 months to move. - [Berberine as "Nature's Ozempic"? (2026): The Honest Verdict](https://verifiedsupplementdata.com/berberine/): Berberine went viral as "nature's Ozempic," but the comparison is wildly off: Ozempic drives 15-20% weight loss, berberine about 2-3%, a very different result. - [Berberine Side Effects: GI Issues & Drug Interactions](https://verifiedsupplementdata.com/berberine/#side-effects): Berberine side effects: dose-related GI issues (diarrhea, cramping, constipation) are common early, and drug interactions matter more than the GI upset. - [Berberine vs Metformin (2026): The Honest Comparison](https://verifiedsupplementdata.com/berberine/vs-metformin/): Berberine vs metformin: one small trial found comparable glucose control, but berberine isn't a substitute for a prescription with decades of outcome data. ### best-magnesium-glycinate-for-sleep - [Redirecting...](https://verifiedsupplementdata.com/best-magnesium-glycinate-for-sleep/) ### beta-alanine - [Beta-Alanine Supplements: What It Is, If It Works & What to Buy](https://verifiedsupplementdata.com/beta-alanine/): Beta-alanine honestly: solid for 1-4 min high-intensity efforts, not strength or short sprints. A loading supplement — the dose, cost, and pre-workout trap. - [Best Beta-Alanine (2026): Cost Per Gram, CarnoSyn vs Generic](https://verifiedsupplementdata.com/beta-alanine/best-overall/): Beta-alanine ranked by verified cost per gram. CarnoSyn vs generic (same molecule), powder vs sustained-release, and why cheap powder wins. - [Beta-Alanine Dosage: How Much Per Day (4-6 g) + Loading](https://verifiedsupplementdata.com/beta-alanine/): How much beta-alanine: 4-6 g/day for 4+ weeks — a loading supplement with no same-day effect. The dose window, the tingle, and an are-you-loading calculator. - [Does the Beta-Alanine Tingle Mean It's Working?](https://verifiedsupplementdata.com/beta-alanine/): The tingle isn't proof of dose. Most pre-workouts label ~2 g beta-alanine — a third of the 4-6 g clinical dose — often hidden in proprietary blends. The math. - [Beta-Alanine vs Creatine: Different Jobs (Often Stacked)](https://verifiedsupplementdata.com/beta-alanine/): Beta-alanine vs creatine: different jobs. Creatine = strength/power; beta-alanine = 1-4 min high-intensity buffering. Complementary, often stacked. ### beta-carotene - [Beta-Carotene: The Lung-Cancer Trials (and Why Most Don't Need It)](https://verifiedsupplementdata.com/beta-carotene/): Two large RCTs, ATBC 1994 and CARET 1996, found high-dose beta-carotene supplements increased lung cancer incidence in smokers - CARET stopped 21 months early. - [Best Beta-Carotene Supplement 2026 (If You Need One at All)](https://verifiedsupplementdata.com/beta-carotene/): Most people get enough beta-carotene from food. If buying, ranked by lower dominance first, not highest IU, flagging 25,000 IU products near ATBC/CARET doses. - [Beta-Carotene Dosage: Retail vs Trial Doses, Smoker Contraindication](https://verifiedsupplementdata.com/beta-carotene/): Retail beta-carotene sells 15,000-25,000 IU (9-15mg); the ATBC and CARET harm trials used 20mg and 30mg/day, within normal retail range. No RDA or UL exists. - [Beta-Carotene and Eye Health: Why AREDS2 Removed It](https://verifiedsupplementdata.com/beta-carotene/for-eye-health/): AREDS2 (2013, JAMA) tested removing beta-carotene from the AREDS formula and found more lung cancers in the beta-carotene arm (23 vs 11), mostly ex-smokers. - [Beta-Carotene: The ATBC and CARET Lung-Cancer Trials, Explained](https://verifiedsupplementdata.com/beta-carotene/): ATBC (1994, n=29,133) found 18% higher lung cancer incidence with beta-carotene in male smokers. CARET (1996, n=18,314) found risk up 28%, stopped early. ### betaine-hcl - [Betaine HCl: The Truth About Stomach Acid and the 'Low Acid' Myth](https://verifiedsupplementdata.com/betaine-hcl/): Betaine HCl re-acidifies the stomach: 1,500mg dropped gastric pH from 5.2 to 0.6 (Yago, P<0.001) in drug-induced hypochlorhydria, not proven for bloating. - [Best Betaine HCl 2026: Plain vs. With Pepsin, Ranked by Cost/Capsule](https://verifiedsupplementdata.com/betaine-hcl/): Most people don't have low stomach acid and the self-test isn't validated; skip this if you take a PPI/H2-blocker. Six plain vs pepsin capsules ranked by cost. - [Does Betaine HCl Actually Fix Low Stomach Acid? The Honest Answer](https://verifiedsupplementdata.com/betaine-hcl/): Betaine HCl reacidifies the stomach in confirmed drug-induced hypochlorhydria (Yago et al., P<0.001) - but fixing bloating or reflux is unproven, no RCTs found. - [Betaine HCl Dosage: Capsule Sizes, 'Titration' (Not Validated)](https://verifiedsupplementdata.com/betaine-hcl/dosage-guide/): Betaine HCl is commonly sold as 500-650mg capsules taken with meals. The popular capsule-titration warmth-test dosing protocol has no clinical validation. - [Betaine HCl for Low Stomach Acid: What the Evidence Actually Shows](https://verifiedsupplementdata.com/betaine-hcl/): Betaine HCl: 1,500mg drops gastric pH from 5.2 to 0.6 (Yago, P<0.001) in drug-induced hypochlorhydria, not proof it treats self-diagnosed low stomach acid. ### betaine-tmg - [Betaine (TMG): The Homocysteine and Pre-Workout Supplement](https://verifiedsupplementdata.com/betaine-tmg/): Betaine (TMG) reliably lowers homocysteine, dose-dependent - a surrogate marker with no proven heart benefit, and 6g/day also raises LDL. Not betaine HCl. - [Best Betaine (TMG) 2026: Powder vs. Capsules, Ranked by Cost/Gram](https://verifiedsupplementdata.com/betaine-tmg/): Betaine (TMG) ranked honestly by cost per gram - bulk powder is 3-13x cheaper than capsules. Six products compared, plus the fishy-odor trade-off at gram doses. - [Does Betaine Actually Improve Strength and Power? What the RCTs Show](https://verifiedsupplementdata.com/betaine-tmg/): Seven betaine sports-performance RCTs show small power gains, but every trial measuring 1-rep-max strength found no advantage over placebo (Cholewa 2018). - [Betaine (TMG) Dosage: 2.5g for Performance vs. 3-6g for Homocysteine](https://verifiedsupplementdata.com/betaine-tmg/): Betaine dosage: ~2.5g/day is the most-used performance dose; 3-6g/day is the homocysteine range. 1g single doses do nothing; 6g/day also raises LDL cholesterol. - [Betaine and Homocysteine: Why Lowering It May Not Help Your Heart](https://verifiedsupplementdata.com/betaine-tmg/): Betaine lowers homocysteine, dose-dependent (Olthof 2003) - a surrogate marker with no proven cardiovascular benefit, and the top dose also raises LDL. ### biotin - [Biotin Supplements Guide (2026): Evidence-Based Comparisons](https://verifiedsupplementdata.com/biotin/): Biotin for hair and nails — what the evidence supports, dosing, and the lab-test interference warning. - [Biotin Benefits: What the Evidence Actually Shows](https://verifiedsupplementdata.com/biotin/#benefits): Biotin's hair/nail benefit is real mainly if you're deficient (rare) — and the bigger issue is that high-dose biotin can distort troponin, thyroid, and other blood tests. - [Best Biotin Supplement (2026): Dose, Value & the Lab-Test Warning](https://verifiedsupplementdata.com/biotin/best-overall/): The best biotin supplements ranked by dose and cost - plus the truth most skip: biotin helps hair/nails if you're deficient, high-dose biotin skews blood tests. - [Biotin Dosage: How Much You Actually Need (Not 10,000 mcg)](https://verifiedsupplementdata.com/biotin/dosage-guide/): How much biotin you need is ~30 mcg, not the 10,000 mcg on the label. Why megadoses don't grow hair unless you're deficient — and the blood-test warning. - [Does Biotin Work for Hair Growth? (2026): The Honest Answer](https://verifiedsupplementdata.com/biotin/for-hair-growth/): Biotin is the most-hyped hair supplement - for most people it does nothing. It only helps if you're deficient. What actually grows hair, and the lab-test risk. - [Biotin for Nails (2026): Does It Help? The Honest Evidence](https://verifiedsupplementdata.com/biotin/for-nails/): Biotin has slightly better (but still weak) evidence for brittle nails than for hair. What the small studies show, plus the realistic dose and timeline. - [Biotin Side Effects: Why the Real Risk Is Your Blood Tests](https://verifiedsupplementdata.com/biotin/#side-effects): Biotin has no established toxicity — it's water-soluble with no upper limit. The real danger of high-dose biotin is a falsely low troponin (missed heart attack) or thyroid results that mimic Graves' disease. ### bloodwork - [Bloodwork Analyzer: What Your Lab Results Mean for Supplements (2026)](https://verifiedsupplementdata.com/bloodwork/): Enter your blood test values and get supplement recommendations. Interprets vitamin D, B12, ferritin, folate, magnesium, TSH, HbA1c with evidence-based doses. ### boron - [Boron: The Trace Mineral for Bone, Hormones, and Joints — Honestly](https://verifiedsupplementdata.com/boron/): Boron, honestly: a small mineral-retention signal for bone, a short-term testosterone shift not replicated in athletes, and CFB-specific joint data explained. - [Best Boron Supplement 2026: Ranked by Form, Dose & Cost per mg](https://verifiedsupplementdata.com/boron/best-overall/): Boron ranked by real cost per elemental mg - every product here discloses elemental boron directly. Calcium fructoborate, the CFB-trial form, often hides it. - [Does Boron Raise Testosterone? What the Trials Actually Show](https://verifiedsupplementdata.com/boron/does-boron-raise-testosterone/): Boron testosterone evidence: a short-term signal in 8 untrained men (Naghii 2011) failed to replicate in a 7-week RCT in bodybuilders (Ferrando & Green 1993). - [Boron Dosage: How Much to Take (and Why More Isn't Better)](https://verifiedsupplementdata.com/boron/dosage-guide/): Boron dosage, honestly: 3 mg/day is the most-studied dose; hormone trials used 2.5-11.6 mg; US limit is 20 mg/day. No evidence more than ~10 mg adds benefit. - [Boron for Bone Health: What Calcium and Vitamin D Evidence Shows](https://verifiedsupplementdata.com/boron/for-bone-health/): Metabolic-ward data show boron at 3mg/day reduces urinary calcium and magnesium loss, real mineral-retention physiology, not a bone-density or fracture finding. ### boswellia - [Boswellia Supplements: The AKBA Number That Isn't on the Label](https://verifiedsupplementdata.com/boswellia/): Boswellia, honestly: the potent active is AKBA, and AKBA-standardized extracts cut knee-OA pain fast, in 5-7 days, in RCTs. Only 4 of 13 products disclose it. - [AKBA vs "Boswellic Acids": Why "65%" Isn't the Active in Boswellia](https://verifiedsupplementdata.com/boswellia/akba-vs-boswellic-acid/): "65% boswellic acids" is a generic spec, not AKBA - the acetyl-11-keto-beta-boswellic acid that inhibits 5-LOX. Commercial AKBA runs 3.83% down to 0.03%. - [Best Boswellia Supplement 2026: Ranked by Disclosed AKBA](https://verifiedsupplementdata.com/boswellia/best-overall/): Boswellia ranked by disclosure tier, AKBA-standardized extracts first, then cost per serving. Only 4 of 13 disclose an AKBA percent or clinical extract. - [Boswellia Dosage: How Much AKBA-Standardized Extract (100–250 mg/day)](https://verifiedsupplementdata.com/boswellia/): Boswellia dosage: trial doses are 100-250 mg/day of an AKBA-standardized extract (5-Loxin 100-250 mg, Aflapin 100 mg), with pain relief onset around 5-7 days. - [Boswellia for Osteoarthritis: What the Evidence Really Shows](https://verifiedsupplementdata.com/boswellia/): Boswellia for knee OA: AKBA-standardized RCTs cut pain and improved function fast, onset day 5-7, and a 7-RCT meta-analysis agreed despite high heterogeneity. ### branched-chain-amino-acids - [BCAAs (Branched-Chain Amino Acids): What They Actually Do](https://verifiedsupplementdata.com/branched-chain-amino-acids/): BCAAs alone raise post-workout muscle protein synthesis about 22%, but that's submaximal next to a full EAA blend - building muscle needs all 9 aminos. - [BCAAs vs. Whole Protein (or EAAs): Do They Build Muscle Alone?](https://verifiedsupplementdata.com/branched-chain-amino-acids/): No trial quantified oral BCAA-alone muscle protein synthesis before 2017; IV data showed BCAAs alone can decrease muscle turnover. Jackman found a 22% bump. - [Do BCAAs Reduce Muscle Soreness (DOMS)? What Meta-Analyses Show](https://verifiedsupplementdata.com/branched-chain-amino-acids/): Five BCAA soreness meta-analyses show consistent creatine-kinase drops but inconsistent subjective-soreness results - works best pre-loaded before exercise. - [Best BCAA Supplement 2026: Powder vs. Capsules, Ranked by Cost per 5g](https://verifiedsupplementdata.com/branched-chain-amino-acids/best-overall/): BCAA supplements ranked by cost per 5g dose - bulk powder is far cheaper than capsules. But for maximizing muscle synthesis, an EAA product wins on evidence. - [BCAA Dosage: The 2-3g Leucine "Trigger" and Why More Isn't the Point](https://verifiedsupplementdata.com/branched-chain-amino-acids/): BCAA dosage: 5-10g/day is typical, delivering about 2.5g leucine at the ~2-3g mTOR-activation threshold - but whey, meat, and eggs already exceed that. ### brands - [Supplement Brand Report Cards](https://verifiedsupplementdata.com/brands/): Data-based report cards for supplement brands: third-party certification rate, price vs category median, and FDA adverse-event reports in context. - [Is Doctor's Best Worth It? Supplements Reviewed](https://verifiedsupplementdata.com/brands/): We graded Doctor's Best on our own catalog data: certification rate, price vs category median, and FDA adverse-event reports in honest context. - [Is Nature Made Worth It? Supplements Reviewed](https://verifiedsupplementdata.com/brands/nature-made/): We graded Nature Made on our own catalog data: certification rate, price vs category median, and FDA adverse-event reports in context, volume bias included. - [Is NOW Foods Worth It? Supplements Reviewed](https://verifiedsupplementdata.com/brands/now-foods/): We graded NOW Foods on our own catalog data: certification rate across 100+ products, price vs category median, and FDA adverse-event reports in context. - [Is Sports Research Worth It? Supplements Reviewed](https://verifiedsupplementdata.com/brands/sports-research/): We graded Sports Research on our own catalog data: certification rate, price vs category median, and FDA adverse-event reports read in honest context. - [Is Thorne Worth It? Thorne Supplements Reviewed](https://verifiedsupplementdata.com/brands/thorne/): We graded Thorne on our own catalog data: certification rate, price vs category median, and FDA adverse-event reports in context. See exactly what the premium buys. ### bromelain - [Bromelain: What the Sinusitis, Surgery & Joint-Pain Trials Show](https://verifiedsupplementdata.com/bromelain/): Bromelain is dosed in GDU/MCU/FIP activity units, not mg - identical 500mg labels can carry a 2.5x potency spread. Best evidence: post-surgical dental swelling. - [Best Bromelain Supplement 2026: Why GDU Matters More Than Milligrams](https://verifiedsupplementdata.com/bromelain/best-overall/): Bromelain ranked by disclosed activity units (GDU), not mg alone - a 500mg/1,200 GDU capsule and a 500mg/3,000 GDU capsule are not the same dose at all. - [Does Bromelain Work? Sinusitis and Surgery vs. the Enzyme-Combo Con](https://verifiedsupplementdata.com/bromelain/): Bromelain: a thin adjunct signal for sinusitis; its strongest thread is post-surgical dental swelling; in osteoarthritis it ALONE misses its primary endpoint. - [Bromelain Dosage: GDU vs. mg, and Why Timing Changes What It Does](https://verifiedsupplementdata.com/bromelain/dosage-guide/): Bromelain dosage uses three unit systems (GDU, MCU, FIP) with no public conversion factor across brands; trial doses ranged 800-1000mg to 3000 FIP/day. - [Bromelain for Swelling After Surgery: The Third-Molar Trials](https://verifiedsupplementdata.com/bromelain/): A 2019 meta-analysis of 6 third-molar-extraction RCTs found bromelain reduced facial swelling and late pain, but had no effect on trismus - dental only. ### calcium - [Calcium Supplements Guide (2026): Evidence-Based Comparisons](https://verifiedsupplementdata.com/calcium/): Calcium forms (citrate vs carbonate), absorption with and without stomach acid, and who needs what. - [Best Calcium Supplement (2026): Form, Dose & the Food-First Truth](https://verifiedsupplementdata.com/calcium/best-overall/): The best calcium supplements ranked by form and cost - plus the honest context: get calcium from food first, and high-dose calcium carries a debated heart risk. - [Calcium Citrate vs Carbonate: Why the Form You Take Matters (2026)](https://verifiedsupplementdata.com/calcium/citrate-vs-carbonate/): Calcium carbonate requires stomach acid to absorb. If you take a PPI or take calcium without food, carbonate is nearly useless - citrate absorbs 10x better. All 6 calcium forms compared. - [Daily Dose of Calcium, Vitamin D & K2: What to Take Together](https://verifiedsupplementdata.com/calcium/daily-dose-with-d3-and-k2/): How much calcium, vitamin D3, and K2 to take daily: 1,000-1,200mg calcium (the gap only), 1,000-2,000 IU D3, and 90-200mcg MK-7 K2, taken with a fatty meal. - [Calcium Dosage Guide (2026): Supplement the Gap, Not a Round Number](https://verifiedsupplementdata.com/calcium/dosage-guide/): How much calcium to take — the RDA is 1,000–1,200 mg, but you only supplement the gap food leaves. Why to split doses over 500 mg, plus the heart-risk nuance. - [Calcium for Bones & Osteoporosis (2026): Does It Prevent Fractures?](https://verifiedsupplementdata.com/calcium/for-bones-osteoporosis/): Calcium plus vitamin D reduces fractures most in deficient, older institutionalized adults, but not in healthy community-dwelling adults per trial evidence. - [Best Calcium for Women Over 50: Dose, Form & the Food-First Rule](https://verifiedsupplementdata.com/calcium/for-women-over-50/): After menopause women lose bone faster and need 1,200mg calcium a day. Why calcium citrate suits older adults, and the heart-risk caution against overdoing it. ### carnosine - [Carnosine: Do the Anti-Aging, Blood Sugar & Muscle Claims Hold Up?](https://verifiedsupplementdata.com/carnosine/): Oral L-carnosine is mostly broken down before it reaches muscle, so beta-alanine is the better route. Diabetes evidence is mixed; anti-aging is unproven. - [Best L-Carnosine Supplement 2026: Ranked by Verified Price per Day](https://verifiedsupplementdata.com/carnosine/best-overall/): For muscle carnosine, beta-alanine is the better buy since oral carnosine degrades first. Real cost per day at the labeled 500mg L-carnosine dose, ranked here. - [Carnosine Dosage: How Much to Take (Why So Much Gets Broken Down)](https://verifiedsupplementdata.com/carnosine/): Carnosine's retail range is 500-1,000mg/day, but serum carnosinase breaks much down first. For muscle carnosine, beta-alanine at 3.2-6.4g/day is the real dose. - [Carnosine for Blood Sugar: What the Diabetes Trials Actually Show](https://verifiedsupplementdata.com/carnosine/): Carnosine and blood sugar: Houjeghani 2018 met every primary endpoint in type 2 diabetes, but Saadati 2023, an equally rigorous 14-week trial, met none. - [Carnosine vs Beta-Alanine: Which One Actually Raises Muscle Carnosine?](https://verifiedsupplementdata.com/carnosine/): Intact carnosine poorly raises muscle carnosine - serum carnosinase breaks most of it down first. Beta-alanine is the better-evidenced route to raise it. ### check - [Check Your Supplement: Is It Any Good? (Free Audit Tool)](https://verifiedsupplementdata.com/check/): Enter the supplement you currently take. We'll tell you if the form is right, the dose is adequate, and whether you're overpaying - then show better options. ### choline - [Choline: Why 90% of Americans Fall Short (Deficiency, Pregnancy, TMAO)](https://verifiedsupplementdata.com/choline/): NIH data shows the average American gets 402mg (men) / 278mg (women) of choline a day, both below the Adequate Intake - and only 10.8% actually meet it. - [Best Choline 2026: Bitartrate vs. Phosphatidylcholine, Choline/$](https://verifiedsupplementdata.com/choline/best-overall/): Choline supplements ranked by disclosed elemental choline mg, not bitartrate salt weight - "650mg choline bitartrate" is only ~260mg of actual choline. - [Do You Need a Choline Supplement? Pregnancy, Liver & the TMAO Question](https://verifiedsupplementdata.com/choline/do-you-need-a-supplement/): Choline is food-first for most people, with a real case for pregnancy and liver conditions, plus an honest read on TMAO, the byproduct tied to heart risk. - [Choline Dosage: AI (425-550mg), Pregnancy, and 3,500mg Upper Limit](https://verifiedsupplementdata.com/choline/dosage-guide/): Choline's Adequate Intake is 425mg/day (women), 550mg/day (men), 450mg/day (pregnancy), below the 930mg pregnancy-trial dose. Upper Limit is 3,500mg/day. - [Choline and Pregnancy: The Cornell Trials on Infant Brain Development](https://verifiedsupplementdata.com/choline/for-pregnancy/): Caudill 2018's controlled-feeding trial found 930mg vs 480mg/day maternal choline in the third trimester predicted faster infant information-processing speed. ### chondroitin - [Chondroitin Guide (2026): Evidence, Dose & the Purity Problem](https://verifiedsupplementdata.com/chondroitin/): Chondroitin sulfate for osteoarthritis — what the trials actually show, why raw-material purity varies wildly, and whether combining it with glucosamine adds anything. - [Best Chondroitin Supplement (2026): Usually Paired With Glucosamine](https://verifiedsupplementdata.com/chondroitin/best-overall/): Chondroitin is almost always sold with glucosamine for joints - the evidence is mixed and modest. What it does, why it's bundled, dose, and honest expectations. - [Chondroitin Dosage: How Much to Take (and the Label Problem)](https://verifiedsupplementdata.com/chondroitin/dosage-guide/): How much chondroitin to take: 800–1,200 mg/day. The honest evidence for arthritis, and why many supplements deliver less than the label claims. - [Chondroitin for Osteoarthritis (2026): Does It Help Joint Pain?](https://verifiedsupplementdata.com/chondroitin/for-osteoarthritis/): Does chondroitin (usually with glucosamine) help knee osteoarthritis? The honest, mixed evidence - GAIT, MOVES, the guideline view - plus dose and timeline. ### chromium - [Chromium Supplements: Modest, Mixed Evidence and Three Label Myths](https://verifiedsupplementdata.com/chromium/): Chromium honestly: glucose evidence in diabetes is modest and meta-analyses disagree, so it's not established. Three things labels get wrong: form, dose, price. - [Best Chromium Supplement 2026: Ranked by Cost Per Serving](https://verifiedsupplementdata.com/chromium/best-overall/): Chromium is a cheap commodity: the identical picolinate dose ranges widely in price, so the spread is brand, not formulation. Ranked here by cost per serving. - [Chromium Dosage: The ~35 mcg You Need vs the 200–1000 mcg on the Shelf](https://verifiedsupplementdata.com/chromium/dosage-guide/): The NIH adequate intake for chromium is ~35mcg/day, with no RDA and no upper limit. Shelf products run 200-1000mcg, 6-29 times that, not a bigger benefit. - [Chromium for Blood Sugar: What the Evidence Really Shows](https://verifiedsupplementdata.com/chromium/for-blood-sugar/): Three chromium meta-analyses disagree on blood sugar: a small HbA1c drop (Suksomboon 2014), no effect (Yin 2015), and "limited effectiveness" (Costello 2016). - [Chromium Forms & Absorption: Picolinate Is Not Better Absorbed](https://verifiedsupplementdata.com/chromium/forms-and-absorption/): Picolinate vs GTF/polynicotinate vs chelate: picolinate is most-studied, but a radiolabeled study found all trivalent-chromium forms absorb only about 1%. ### citicoline - [Citicoline (CDP-Choline): Cognizin vs the Null Stroke Trial](https://verifiedsupplementdata.com/citicoline/): Two Kyowa Hakko/Cognizin-funded trials show modest attention/memory gains, but the largest citicoline RCT ever run (ICTUS, n=2,298) found no stroke benefit. - [Best Citicoline Supplement 2026: Cognizin vs CDP-Choline, Cost per mg](https://verifiedsupplementdata.com/citicoline/best-overall/): Citicoline ranked by cost per mg: Cognizin is the branded material used in the Kyowa Hakko-funded trials, and the cheapest cost per mg here is Cognizin. - [Does Citicoline Work? Cognizin Trials vs the Null Stroke Trial](https://verifiedsupplementdata.com/citicoline/): Citicoline: two modest Cognizin-funded cognition trials, a Cochrane review finding no attention benefit, and the largest citicoline RCT ever run came back null. - [Citicoline Dosage: 250-500mg for Focus/Memory, More for Stroke](https://verifiedsupplementdata.com/citicoline/): Citicoline dosage: cognition trials used 250-500mg/day, while the ICTUS stroke trial used up to 2,000mg/day oral. No RDA or UL exists, since it isn't essential. - [Citicoline for Focus, Attention & Memory: What the Trials Show](https://verifiedsupplementdata.com/citicoline/): Citicoline's attention/memory evidence: exactly two PubMed-indexed trials, both Cognizin-funded - McGlade 2019 in males, Nakazaki 2021 in older adults. ### citrus-bergamot - [Citrus Bergamot for Cholesterol: The Research, and Who's Behind It](https://verifiedsupplementdata.com/citrus-bergamot/): Bergamot polyphenols may lower LDL and raise HDL in short Italian trials, but the biggest effects come from groups with commercial ties to the extract. - [Best Citrus Bergamot 2026: Ranked by Standardization & Cost per Day](https://verifiedsupplementdata.com/citrus-bergamot/best-overall/): Citrus bergamot products compared: only 1 of 6 discloses the polyphenol standardization % the trials tested. Ranked by that disclosure, then cost per day. - [Does Citrus Bergamot Lower Cholesterol? An Evidence-Quality Reckoning](https://verifiedsupplementdata.com/citrus-bergamot/): Citrus bergamot's industry-tied RCTs show large cholesterol effects, but the independent review found a smaller signal. Verdict: promising, not statin-level. - [Citrus Bergamot Dosage: How Much BPF Do the Trials Actually Use?](https://verifiedsupplementdata.com/citrus-bergamot/dosage-guide/): Citrus bergamot dosage, honestly: trials range 400-1,300mg/day BPF, a 500mg dose produced no effect in one trial, and there's no government RDA or upper limit. - [Citrus Bergamot for Cholesterol: LDL, Triglycerides & Realistic Result](https://verifiedsupplementdata.com/citrus-bergamot/): The RCTs behind bergamot's cholesterol claim, Gliozzi 2013, Capomolla 2019, Pierdomenico 2023, show before/after numbers with conflicts of interest disclosed. - [How Long Does Citrus Bergamot Take to Work?](https://verifiedsupplementdata.com/citrus-bergamot/#how-long-to-work): Citrus bergamot's cholesterol trials ran 30 days to 6 months, but none report an earlier checkpoint, so trial length isn't the same thing as onset speed. ### cla - [CLA (Conjugated Linoleic Acid): A Modest Fat-Loss Supplement, Honestly](https://verifiedsupplementdata.com/cla/): CLA's dramatic animal fat loss doesn't hold up in humans: two meta-analyses find only a small, plateauing effect, with real downsides like insulin resistance. - [Best CLA Supplement 2026: Ranked by Isomer Blend, Dose & Cost per Gram](https://verifiedsupplementdata.com/cla/best-overall/): CLA ranked by cost per gram of active CLA, including one product whose '1000mg' label overstates its content. Fat-loss evidence is modest, metabolic-risk real. - [Does CLA Actually Cause Fat Loss? The Animal-vs-Human Gap, Explained](https://verifiedsupplementdata.com/cla/): CLA melts fat in rodents, but two human meta-analyses find only a small, plateauing effect - and RCTs found it worsens insulin resistance and lowers HDL. - [CLA Dosage: How Much to Take (and Why More Isn't Better)](https://verifiedsupplementdata.com/cla/): CLA's meta-analysis median dose is 3.2g/day (range 1.7-6.8g/day); Blankson 2000 found no added fat-loss benefit above 3.4g/day, only more metabolic risk. - [CLA for Fat Loss: Realistic Expectations Before You Buy](https://verifiedsupplementdata.com/cla/): CLA's fat-loss effect of ~0.09kg/week amounts to roughly a pound over 12 weeks, then plateaus, bundled with a real metabolic-risk trade-off: insulin resistance. ### cod-liver-oil - [Cod Liver Oil: What the Evidence Shows — the Vitamin A Ceiling to Know](https://verifiedsupplementdata.com/cod-liver-oil/): Cod liver oil is a fixed-ratio source of EPA/DHA, preformed vitamin A, and D you cannot dose independently. The vitamin A load is the real safety limit here. - [Best Cod Liver Oil 2026: Vitamin A/D Disclosure, Then the A Limit](https://verifiedsupplementdata.com/cod-liver-oil/best-overall/): Cod liver oil ranked by whether the label discloses vitamin A in mcg RAE or IU and how close a serving gets to the 3,000mcg RAE limit. Only 2 of 5 disclose it. - [Cod Liver Oil Dosage: EPA/DHA You Get vs the Vitamin A Limit](https://verifiedsupplementdata.com/cod-liver-oil/dosage-guide/): Cod liver oil's binding constraint isn't how much omega-3 you want, it's how much vitamin A that requires - some servings already deliver 8-25% of the adult UL. - [Cod Liver Oil for Joint Pain & Stiffness: What the RA Trials Show](https://verifiedsupplementdata.com/cod-liver-oil/): A real RCT (Galarraga 2008, n=97) found cod liver oil had an NSAID-sparing effect in diagnosed rheumatoid arthritis, but no RA disease-marker difference. - [Cod Liver Oil, Fish Oil, or Vitamin D? (Watch the Vitamin A Ceiling)](https://verifiedsupplementdata.com/cod-liver-oil/): Cod liver oil gives EPA/DHA plus vitamin A and D in a fixed ratio you can't adjust; fish oil gives more omega-3 with no vitamin A load; D3 doses precisely. ### collagen - [Collagen Supplements: Does It Work, How Much & What to Buy](https://verifiedsupplementdata.com/collagen/): Collagen honestly: good for skin, modest for joints, thin for hair and nails. Does it survive digestion, the studied dose, and how to buy a clean one. - [Collagen Benefits: What the Evidence Actually Supports](https://verifiedsupplementdata.com/collagen/#benefits): Collagen benefits ranked by evidence: skin is real but industry-funded, joint pain is modest in athletes and osteoarthritis, bone density has one solid trial line, hair/nails/gut are mostly unproven. - [Best Collagen Supplement (2026): Peptides Ranked by Dose, Type & Cost](https://verifiedsupplementdata.com/collagen/best-overall/): The best collagen peptide supplements ranked by dose, type (I & III), third-party testing, and cost per day. What the skin and joint evidence actually shows. - [Best Time to Take Collagen: Morning or Night?](https://verifiedsupplementdata.com/collagen/#best-time-to-take): Best time to take collagen: no trial has tested morning versus evening, and this site's own dosage guide says time of day doesn't change the results at all. - [Does Collagen Actually Work? (2026): Evidence by Goal, Honestly](https://verifiedsupplementdata.com/collagen/#does-it-work): A no-hype look at collagen evidence: solid for skin, modest for joints, thin for hair and nails. The "it just gets digested" debate, and where it wastes money. - [Collagen Dosage Guide (2026): Type and Dose Both Matter](https://verifiedsupplementdata.com/collagen/dosage-guide/): How much collagen to take — 2.5–15 g of hydrolyzed peptides for skin, bone and muscle, but just 40 mg of UC-II for joints. Doses by goal, plus which type. - [Best Collagen for Skin (2026): What RCTs Show on Elasticity & Wrinkles](https://verifiedsupplementdata.com/collagen/for-skin/): Skin is collagen's best-evidenced use - trials and a meta-analysis show peptides improve elasticity and hydration over 8-12 weeks. The dose, products ranked. - [How Long Does Collagen Take to Work?](https://verifiedsupplementdata.com/collagen/#how-long-to-work): How long collagen takes to work: skin trials show gains at 8-12 weeks, joint trials at 90-180 days, and one bone-density trial ran a full 12 months straight. ### colostrum - [Colostrum Supplements: What Works & What to Buy (2026)](https://verifiedsupplementdata.com/colostrum/): Bovine colostrum, honestly: what the evidence supports (gut, exercise) and doesn't (skin, immunity), plus why most brands hide the IgG that signals potency. - [ARMRA vs Cowboy Colostrum (2026): Neither Discloses Its IgG](https://verifiedsupplementdata.com/colostrum/armra-vs-cowboy-colostrum/): ARMRA vs Cowboy Colostrum on price, sourcing, and processing — plus the spec both hide: IgG. How they differ, and why a disclosed brand may beat both. - [Colostrum Benefits (2026): Graded by Evidence](https://verifiedsupplementdata.com/colostrum/#benefits): Colostrum's real benefits are narrower than the trend: fewer respiratory symptom days in athletes and blunted exercise-induced gut permeability, with exact effect sizes from the trials. - [Best Colostrum Supplement (2026): Ranked by Disclosed IgG](https://verifiedsupplementdata.com/colostrum/best-overall/): The best bovine colostrum, ranked by disclosed IgG and cost per gram of IgG — the spec most brands, including ARMRA, hide. We ranked the ones that disclose it. - [Does Colostrum Work? What the Evidence Shows (2026)](https://verifiedsupplementdata.com/colostrum/#does-it-work): Evidence-graded, with PubMed citations: colostrum has reasonable support for gut and exercise uses, little to none for the beauty, immunity, and anti-aging claims. - [Colostrum Dosage: How Much to Take (2026)](https://verifiedsupplementdata.com/colostrum/dosage-guide/): How much colostrum per day (studied doses dwarf the label serving), plus a calculator for the grams of IgG you actually get and what you pay per gram. - [How Long Does Colostrum Take to Work?](https://verifiedsupplementdata.com/colostrum/#how-long-to-work): Colostrum's gut-protection evidence is acute, dosed alongside a single stressor, not built up over weeks. An 8-week daily trial found permeability worsened. ### conditions - [Health Condition Supplement Protocols — Evidence-Based](https://verifiedsupplementdata.com/conditions/): Evidence-ranked supplement protocols for specific health conditions. Each includes clinical doses, specific products, timing, and drug interaction warnings. - [Supplements for Anxiety & Depression (2026): Evidence-Ranked Protocol](https://verifiedsupplementdata.com/conditions/anxiety-depression/): Evidence-ranked supplement protocol for anxiety and depression: magnesium, omega-3, ashwagandha, vitamin D, SAMe ranked by evidence level, with dosing and cost. - [Best Supplements for Brain Fog (2026): Evidence-Ranked](https://verifiedsupplementdata.com/conditions/): Brain fog is a symptom, not a diagnosis. What the evidence really shows for omega-3, B12, iron, vitamin D, and magnesium L-threonate — cause matters most. - [Best Supplements for Fatigue & Low Energy (2026)](https://verifiedsupplementdata.com/conditions/): Most fatigue supplements only work if you're actually deficient. Get ferritin, B12, and vitamin D tested first, then target the gap. Evidence-ranked protocol. - [Best Supplements for Immune Support (2026): What the Evidence Says](https://verifiedsupplementdata.com/conditions/immune-support/): Vitamin D, zinc, vitamin C, and probiotics for immune support - ranked by clinical evidence. What shortens a cold, what prevents infections, and what to skip. - [Joint Pain & Arthritis Supplements (2026): Evidence-Ranked Protocol](https://verifiedsupplementdata.com/conditions/joint-pain/): Evidence-ranked supplement protocol for joint pain and arthritis: curcumin, glucosamine, chondroitin, omega-3, collagen ranked by evidence, with dosing, cost. - [PCOS Supplements (2026): Evidence-Ranked Protocol from 46 RCTs](https://verifiedsupplementdata.com/conditions/pcos/): Evidence-ranked supplement protocol for PCOS. Myo-inositol, vitamin D, NAC, berberine, and omega-3 ranked by RCT evidence. Metformin interactions, dosing, cost per day. - [Best Supplements for Sleep (2026): Evidence-Ranked](https://verifiedsupplementdata.com/conditions/sleep/): Evidence-ranked supplements for sleep: melatonin, magnesium, ashwagandha, glycine, L-theanine. What the RCTs actually show, with honest grading and doses. - [Best Supplements for Stress (2026): Evidence-Ranked Protocol](https://verifiedsupplementdata.com/conditions/stress/): The supplements with real evidence for stress: ashwagandha (lowers cortisol), magnesium glycinate, and L-theanine. Ranked by trials, doses, and cost per day. ### contact - [Contact — Verified Supplement Data](https://verifiedsupplementdata.com/contact/): How to reach Verified Supplement Data: report a data error or outdated price, ask about our methodology, request a correction, or contact us about licensing and press. ### copper - [Copper: A Food-Covered Mineral — Until High-Dose Zinc Gets in the Way](https://verifiedsupplementdata.com/copper/): Most iron-replete adults already exceed the 900mcg copper RDA from food. The real reason to supplement is offsetting long-term high-dose zinc supplementation. - [Best Copper Supplement 2026: Bisglycinate vs Gluconate, Cost per mg](https://verifiedsupplementdata.com/copper/best-overall/): Copper ranked by real cost per elemental mg; every tracked product discloses elemental copper directly. Diet composition affects absorption more than form. - [Does Copper Reverse Gray Hair or Boost Collagen? The Evidence](https://verifiedsupplementdata.com/copper/does-copper-reverse-gray-hair/): Copper is a real cofactor for melanin synthesis and collagen cross-linking - but no human RCT supports oral copper or GHK-Cu drops reversing gray hair. - [Copper Dosage: RDA 900mcg, the 10mg Limit, and Why More Isn't Better](https://verifiedsupplementdata.com/copper/dosage-guide/): Copper RDA is 900mcg/day for adults (1,000 pregnancy, 1,300 lactation), with a 10mg/day upper limit. Average US dietary intake already clears the RDA from food. - [Copper for High-Dose Zinc Users: The Ratio That Actually Matters](https://verifiedsupplementdata.com/copper/for-zinc-supplement-users/): Chronic high-dose zinc blocks copper absorption via intestinal metallothionein, a path to sideroblastic anemia and neutropenia. Ratio: 15mg zinc to 1mg copper. ### coq10 - [CoQ10 Supplements Guide (2026): Evidence-Based Comparisons](https://verifiedsupplementdata.com/coq10/): CoQ10 forms (ubiquinol vs ubiquinone), absorption, and use with statins. - [CoQ10 Benefits: What the Evidence Actually Supports](https://verifiedsupplementdata.com/coq10/#benefits): CoQ10 benefits, graded by evidence: strong for heart failure (Q-SYMBIO), good for migraine, contested for statin muscle pain, and unproven for energy in healthy people. - [Best CoQ10 Supplement (2026): Ubiquinol vs Ubiquinone, Dose & Cost](https://verifiedsupplementdata.com/coq10/best-overall/): The best CoQ10 supplements ranked by form, absorption, and cost. When ubiquinol beats ubiquinone, why take it with fat, and what statin evidence shows. - [Best Time to Take CoQ10: Morning or Night?](https://verifiedsupplementdata.com/coq10/#best-time-to-take): Best time to take CoQ10: clock time doesn't really matter thanks to its long half-life. Take it with a fat-containing meal, and split doses above 200mg. - [Does CoQ10 Actually Work? What the Evidence Shows](https://verifiedsupplementdata.com/coq10/#does-it-work): Does CoQ10 work? Strong evidence for heart failure, good for migraine, and contested for statin muscle pain, where meta-analyses disagree. The verdict. - [CoQ10 Dosage: How Much to Take (by Goal) + Ubiquinol vs Ubiquinone](https://verifiedsupplementdata.com/coq10/dosage-guide/): How much CoQ10 to take: 100–200 mg/day general, 300 mg for heart failure or migraine, why ubiquinol lets you take less, and how to actually absorb it. - [CoQ10 and Statins: Should You Take It? What Trials Show](https://verifiedsupplementdata.com/coq10/for-statins/): Why take CoQ10 with a statin? Statins lower CoQ10 levels, but trials on muscle pain are mixed. What meta-analyses show, the 100–200 mg dose, and what not to do. - [How Long Does CoQ10 Take to Work?](https://verifiedsupplementdata.com/coq10/#how-long-to-work): How long CoQ10 takes to work depends on why you take it: heart-failure benefit took 2 years, migraine prevention showed by month 3, statin pain sooner. - [Qunol vs Doctor's Best CoQ10 (2026): Both Are Ubiquinone](https://verifiedsupplementdata.com/coq10/qunol-vs-doctors-best/): Qunol Ultra vs Doctor's Best CoQ10 — neither is ubiquinol. Compared on dose, absorption tech (solubilized vs BioPerine), and cost per day. - [Qunol vs Life Extension CoQ10 100 mg (2026)](https://verifiedsupplementdata.com/coq10/qunol-vs-life-extension/): Both are 100 mg of CoQ10, but Qunol is solubilised ubiquinone and Life Extension is ubiquinol. Here is what that actually changes, and the cost gap. - [CoQ10 Side Effects: Warfarin Interaction & Blood Pressure](https://verifiedsupplementdata.com/coq10/#side-effects): CoQ10 side effects are mild overall; the real risks are a warfarin interaction and a possible additive effect with blood-pressure-lowering medication. - [Ubiquinol vs Ubiquinone (2026): Which CoQ10 Form Should You Buy?](https://verifiedsupplementdata.com/coq10/ubiquinol-vs-ubiquinone/): Ubiquinol is more bioavailable, but ubiquinone is cheaper, better-studied, and fine for most. The honest decision by age, and what absorption studies show. ### cordyceps - [Cordyceps: The Two Things the Label Won't Tell You](https://verifiedsupplementdata.com/cordyceps/): Cordyceps honestly: the actives are beta-glucans and cordycepin, and most US "cordyceps" is mycelium-on-grain (largely starch). Only 2 of 11 products disclose a beta-glucan %. - [Best Cordyceps Supplement 2026: Ranked by Form & Disclosure](https://verifiedsupplementdata.com/cordyceps/): Cordyceps ranked by form (fruiting body vs mycelium-on-grain) and whether it discloses beta-glucan percent. Only 2 of 11 disclose one; 6 are mycelium-on-grain. - [Does Cordyceps Work? The Honest Evidence (and the Safety Landmines)](https://verifiedsupplementdata.com/cordyceps/#does-it-work): Cordyceps: VO2max was unchanged in the Cs-4 trial, the endurance gain came from a 10-person blend study, and the immune signal is small. Bleeding risk applies. - [Cordyceps Dosage: Why Form Matters More Than Milligrams](https://verifiedsupplementdata.com/cordyceps/): Cordyceps dosage: no consensus dose - Cs-4 runs ~1-3 g/day, militaris blends ~4 g/day. What matters is beta-glucan, not milligrams; only 2 of 11 disclose it. - [Fruiting Body vs Mycelium-on-Grain: The Cordyceps Starch Trap](https://verifiedsupplementdata.com/cordyceps/): Most US "cordyceps" is mycelium-on-grain, dried on rice or oats, running ~35-65% starch by industry lab analysis, versus under 5% in a true fruiting body. ### corrections - [Corrections & Changelog — Verified Supplement Data](https://verifiedsupplementdata.com/corrections/): How we handle errors, and a public log of every correction we have made. If our data is wrong, we want to fix it and show our work. ### cranberry - [Cranberry Supplements: The PAC Number That Isn't on the Label](https://verifiedsupplementdata.com/cranberry/): Cranberry honestly: the active is A-type PAC, which reduces the risk of recurrent UTIs (RR 0.74, Cochrane). The catch: only 4 of 13 products disclose their PAC. - [Best Cranberry Supplement 2026: Ranked by Disclosed A-Type PAC](https://verifiedsupplementdata.com/cranberry/best-overall/): Cranberry ranked by whether it discloses A-type PAC, then cost per day at the studied 36 mg dose. Only 4 of 13 products print an actual PAC figure on the label. - [Cranberry Dosage: How Much A-Type PAC (~36 mg/day)](https://verifiedsupplementdata.com/cranberry/dosage-guide/): How much cranberry: studied dose is ~36 mg of A-type PAC per day (BL-DMAC method) for recurrent-UTI risk - prevention, not treatment. Why you can't verify it. - [Cranberry for UTI Prevention: What the Evidence Really Shows](https://verifiedsupplementdata.com/cranberry/for-uti-prevention/): Cranberry cuts recurrent-UTI risk modestly: RR 0.74 (95% CI 0.55-0.99) in women, RR 0.46 in children per a 2023 Cochrane review, but two key trials were null. - [Cranberry PAC Label Trap: Why 25,000mg Equivalent Isn't the Dose](https://verifiedsupplementdata.com/cranberry/pac-label-trap/): "25,000 mg cranberry equivalent" and a big Pacran number describe fruit-equivalent weight, not the active. A-type PAC is what's studied, at about 36 mg/day. ### creatine - [Creatine Guide (2026): The Most-Researched Supplement in History](https://verifiedsupplementdata.com/creatine/): Everything about creatine supplementation based on 500+ published studies. Monohydrate vs HCl, loading protocol, cognitive benefits, safety, and best products. - [Creatine Benefits (2026): What It Does, Graded by Evidence](https://verifiedsupplementdata.com/creatine/#benefits): Creatine benefits ranked by evidence strength: strength/power gains are the strongest finding, hypertrophy is real but modest, and cognitive effects are emerging. Verified effect sizes. - [Best Creatine for Muscle Growth (2026): What Builds Muscle](https://verifiedsupplementdata.com/creatine/best-for-muscle-building/): Creatine is the most proven muscle supplement - it works by fueling harder training, not magic. Realistic gains, the dose, and products ranked by cost per 5g. - [Best Creatine for Women (2026): Muscle, Bone, Brain & Myths to Skip](https://verifiedsupplementdata.com/creatine/best-for-women/): Creatine works the same for women as men, and women may benefit more. The evidence for muscle, bone, cognition, why it won't make you bulky, plus the dose. - [Best Creatine Monohydrate (2026): Products Ranked by Cost Per 5g Dose](https://verifiedsupplementdata.com/creatine/best-overall/): The best creatine monohydrate supplements ranked by cost per 5g daily dose, purity (Creapure vs generic), and third-party certifications, plus safety data. - [Best Time to Take Creatine: Morning, Night & Workout Timing](https://verifiedsupplementdata.com/creatine/#best-time-to-take): Best time to take creatine: timing barely matters since saturation builds from daily dosing, not the clock. What ISSN evidence says about workouts and food. - [Creatine Dosage Guide (2026): Loading vs Maintenance & Timing](https://verifiedsupplementdata.com/creatine/dosage-guide/): How much creatine to take, whether you need a loading phase, when to take it, and whether to cycle. Evidence-based dosing: 3-5g daily, with loading optional. - [Creatine for the Brain (2026): The Cognitive Evidence, Honestly](https://verifiedsupplementdata.com/creatine/for-brain/): Creatine is moving from a muscle supplement to a cognitive one. Evidence for memory and thinking is strongest under stress, sleep loss, and in vegetarians. - [Creatine Monohydrate vs HCl vs Other Forms (2026): Which Is Best?](https://verifiedsupplementdata.com/creatine/forms-compared/): Creatine monohydrate is the gold standard — no form (HCl, buffered, ethyl ester) is proven better, and some are worse. Which one to actually buy. - [Do Creatine Gummies Actually Work? (2026): What Lab Tests Found](https://verifiedsupplementdata.com/creatine/gummies/): Independent lab testing found many creatine gummies deliver a fraction of labeled dose - one had 0.005g of 5g claimed. Why gummies struggle, when powder wins. - [How Long Does Creatine Take to Work?](https://verifiedsupplementdata.com/creatine/#how-long-to-work): Creatine saturates muscle stores in about 3-4 weeks without loading, or about a week with a loading phase — the timeline the ISSN evidence actually supports. - [Creatine Monohydrate vs HCl vs Gummies: Which to Actually Buy](https://verifiedsupplementdata.com/creatine/monohydrate-vs-hcl/): Creatine monohydrate vs HCl vs gummies, compared on evidence, dose, solubility, and cost. Why monohydrate wins for almost everyone, and when HCl is worth it. - [NOW Foods vs Thorne Creatine Monohydrate (2026)](https://verifiedsupplementdata.com/creatine/now-foods-vs-thorne/): Both are 5 g of creatine monohydrate per scoop. Thorne uses Creapure and is NSF Certified for Sport at roughly 2.5x the cost per day. - [Creatine Side Effects: What the Research Actually Shows](https://verifiedsupplementdata.com/creatine/#side-effects): Creatine side effects, tested: kidney damage, hair loss/DHT, dehydration, and cramping have largely not been borne out in studies. The real effects are GI upset at large doses and water retention inside muscle cells. - [Thorne vs Optimum Nutrition Creatine (2026): Same Molecule](https://verifiedsupplementdata.com/creatine/thorne-vs-optimum-nutrition/): Thorne vs Optimum Nutrition creatine compared: same monohydrate molecule and dose, different certification (NSF vs Banned Substance Tested) and price. ### curcumin - [Curcumin Supplements Guide (2026): Evidence-Based Comparisons](https://verifiedsupplementdata.com/curcumin/): Curcumin bioavailability (the core problem), absorption-enhanced forms, and joint-pain evidence. - [Best Turmeric/Curcumin (2026): Why Bioavailability Is Everything](https://verifiedsupplementdata.com/curcumin/best-overall/): Plain turmeric is barely absorbed. The only thing that matters in a curcumin supplement is the absorption technology - Meriva, Longvida, and piperine compared. - [Best Time to Take Curcumin: With Fat or Black Pepper?](https://verifiedsupplementdata.com/curcumin/#best-time-to-take): Best time to take curcumin: the real rule is food, not the clock. Take it with a fat-containing meal, and co-dose piperine (black pepper) each time you take it. - [Curcumin Absorption: Piperine vs Meriva — Why Plain Turmeric Fails](https://verifiedsupplementdata.com/curcumin/bioavailability/): Curcumin is almost useless without an absorption fix. How piperine, Meriva, Longvida, and Theracurmin compare, and the piperine drug-interaction caution. - [Does Curcumin Actually Work? What the Evidence Shows](https://verifiedsupplementdata.com/curcumin/#does-it-work): Does curcumin work? Strong for knee osteoarthritis, moderate for inflammation and lipids, preliminary for depression, but only in a bioavailable form. - [Curcumin Dosage Guide (2026): How Much to Take (Why Form Beats Dose)](https://verifiedsupplementdata.com/curcumin/dosage-guide/): How much curcumin to take — plain turmeric is barely absorbed, so the form matters more than the dose. Doses by goal, plus the liver caution. - [Curcumin for Joint Pain & Arthritis (2026): How It Compares to NSAIDs](https://verifiedsupplementdata.com/curcumin/for-joint-pain/): Curcumin is one of the best-evidenced supplements for knee osteoarthritis. Head-to-head trials show it rivals ibuprofen for pain, with fewer GI side effects. - [Curcumin Side Effects: Liver Warning & Drug Interactions](https://verifiedsupplementdata.com/curcumin/#side-effects): Curcumin side effects include a real, NIH-documented liver-injury signal, plus a piperine interaction that raises levels of your other medications too. ### d-mannose - [D-Mannose for UTIs: What the Evidence Shows (Including a Null Trial)](https://verifiedsupplementdata.com/d-mannose/): D-mannose blocks E. coli bladder adhesion in the lab, and early trials looked promising, but MERIT (2024, 598 women) found no benefit for UTI prevention. - [Best D-Mannose Supplement 2026: Powder vs Capsules, Cost per 2g Dose](https://verifiedsupplementdata.com/d-mannose/best-overall/): D-mannose ranked by cost per day at the 2 g studied dose, the identical dose used in Kranjcec 2014 and MERIT 2024. Powder hits it in a single measured scoop. - [Does D-Mannose Actually Prevent UTIs? The MERIT Trial vs the Hype](https://verifiedsupplementdata.com/d-mannose/): The best trial, MERIT 2024 (double-blind, 598 women, JAMA Intern Med), found no benefit vs placebo, overturning the open-label result from Kranjcec 2014. - [D-Mannose Dosage: How Much Do the Trials Actually Use?](https://verifiedsupplementdata.com/d-mannose/dosage-guide/): The trial-standard D-mannose dose is 2 g/day, used in Kranjcec 2014 and MERIT 2024. No RDA/UL exists. Capsule math, the Domenici protocol, and a calculator. - [D-Mannose for Recurrent UTI Prevention: Honestly Scoped After MERIT](https://verifiedsupplementdata.com/d-mannose/): D-mannose is biologically plausible and low-risk, but MERIT, a 2024 double-blind, placebo-controlled trial of 598 women, found no benefit for recurrent UTIs. ### data - [Supplement Dataset: Cost-per-Effective-Dose & Evidence (CC BY 4.0)](https://verifiedsupplementdata.com/data/): A free, citable dataset of 72 supplement products across 16 categories: elemental doses, cost per effective dose, certifications, and evidence grades. ### deficiency-stats - [Nutrient Deficiency in America (2026): CDC Blood Test Data](https://verifiedsupplementdata.com/deficiency-stats/): Real CDC NHANES blood biomarker data on vitamin D, iron, folate, B12, and magnesium deficiency. Prevalence by age, sex, and race from 8,360+ adults, sourced. ### digestive-enzymes - [Digestive Enzymes: What Works — Lactase, Alpha-Galactosidase & More](https://verifiedsupplementdata.com/digestive-enzymes/): Digestive enzymes graded by use: lactase for lactose intolerance is RCT-backed; broad-spectrum bloating blends rest on thin, industry-linked evidence. - [Lactase for Lactose Intolerance: Evidence, Units & When It Helps](https://verifiedsupplementdata.com/digestive-enzymes/): Lactase is this category's strongest-evidenced use: crossover RCTs (Montalto 2005, Ojetti 2010) show it cuts breath hydrogen and symptoms after dairy. - [Best Digestive Enzymes 2026: The Right Pick Depends on What's Wrong](https://verifiedsupplementdata.com/digestive-enzymes/best-overall/): No single best digestive enzyme - lactase and alpha-galactosidase both have real, targeted evidence; broad-spectrum bloating blends do not, at any price. - [Do Digestive Enzymes Actually Work? The Honest, Use-by-Use Answer](https://verifiedsupplementdata.com/digestive-enzymes/): Graded by use: lactase for lactose intolerance is strong (Montalto 2005, Ojetti 2010); broad-spectrum blends for bloating are thin, unproven evidence. - [Digestive Enzyme Dosage: Activity Units (FCC, ALU, GalU) Explained](https://verifiedsupplementdata.com/digestive-enzymes/dosage-guide/): Lactase is dosed in FCC/ALU units with the first bite of dairy; alpha-galactosidase in GalU units at the meal's start. Broad-spectrum blends are mg-labeled. ### editorial-standards - [Editorial & Verification Standards — Verified Supplement Data](https://verifiedsupplementdata.com/editorial-standards/): How we source, cross-check, and verify every claim: our evidence hierarchy, the verification process behind each number, independence, funding, review policy. ### elderberry - [Elderberry Supplements: Honest Evidence & the Anthocyanin Label Gap](https://verifiedsupplementdata.com/elderberry/): Elderberry, honestly: small, industry-funded trials look positive, but the most rigorous independent trial found nothing - overall, low-certainty evidence. - [Elderberry Anthocyanin Label Trap: 10,000mg Equivalent Isn't the Dose](https://verifiedsupplementdata.com/elderberry/anthocyanin-label-trap/): Anthocyanins are elderberry's marker actives, but only 1 of 13 products discloses an anthocyanin %. Raw-fruit anthocyanin content varies ~58x by cultivar. - [Elderberry Benefits: What the Evidence Actually Shows](https://verifiedsupplementdata.com/elderberry/#benefits): Elderberry benefits graded by evidence: cold/flu symptom relief is low-to-very-low certainty, cholesterol claims are largely untested, and raw berries carry a real poisoning risk. - [Best Elderberry Supplement 2026: Ranked by Disclosure, Not Hype](https://verifiedsupplementdata.com/elderberry/best-overall/): Elderberry ranked by what it discloses: anthocyanin % first, then extract ratio, then bare 'equivalent' claims, then cost. Only 1 of 13 products discloses it. - [Does Elderberry Work for Colds and Flu? The Honest, Mixed Evidence](https://verifiedsupplementdata.com/elderberry/#does-it-work): Small trials found reduced cold symptoms (Hawkins 2019 meta) - but 3 of 4 were industry-funded, and the rigorous independent trial found nothing (Macknin 2020). - [Elderberry Dosage: Trial Doses by Form (Not Interchangeable)](https://verifiedsupplementdata.com/elderberry/dosage-guide/): Elderberry trials dosed by form: syrup 15mL up to 4x/day (Zakay-Rones 2004), extract 600-900mg/day (Tiralongo 2016). Brand doses vary without a disclosed %. ### electrolytes - [Electrolytes: What They Are & Who Actually Needs Them (2026)](https://verifiedsupplementdata.com/electrolytes/): A plain-English guide to electrolyte powders: how much sodium you actually need and when the sugar helps. Most sedentary people need far less than marketed. - [Best Electrolyte Drinks (2026): Ranked by Sodium & Testing](https://verifiedsupplementdata.com/electrolytes/best-overall/): The best electrolyte powders, ranked by what labels hide: real sodium per serving (an 18x range), cost per serving, and which are actually third-party tested. - [Do Electrolytes Actually Work? What the Evidence Shows](https://verifiedsupplementdata.com/electrolytes/#does-it-work): Do electrolytes work? Yes for heavy sweat loss, keto, illness, and POTS, but most people on a normal diet don't need them, and over-hydration is real. - [How Much Sodium & Electrolytes Do You Need? (2026 Guide)](https://verifiedsupplementdata.com/electrolytes/dosage-guide/): How much sodium, potassium, and magnesium you need per day, by situation - an evidence-graded guide showing most people need less than marketing implies. - [Electrolyte Formulas Compared (2026): Full Data Table + DIY](https://verifiedsupplementdata.com/electrolytes/formulas-compared/): The complete electrolyte-powder data table: real sodium, potassium, magnesium, sugar, cost per serving, and testing for every major product, or DIY for $0.05. - [Best Gatorade Alternatives (2026): Ranked by Sodium & Sugar](https://verifiedsupplementdata.com/electrolytes/gatorade-alternatives/): Best Gatorade alternatives, ranked by sodium and sugar: Gatorlyte carries 490mg sodium and 10g sugar. Cheaper, zero-sugar, tested picks compared here. - [How Long Do Electrolytes Take to Work?](https://verifiedsupplementdata.com/electrolytes/#how-long-to-work): How long electrolytes take to work: no trial times a subjective kick-in point. What's measured is sodium loss (300-600mg/hour) and faster uptake with glucose. - [Liquid I.V. vs Transparent Labs Hydrate (2026)](https://verifiedsupplementdata.com/electrolytes/): Both deliver 500 mg of sodium per serving. Transparent Labs is Informed Choice certified and costs roughly half as much per serving. The sugar difference matters. - [Liquid I.V. Review: What's Actually In It](https://verifiedsupplementdata.com/electrolytes/): Liquid I.V. review: 500mg sodium and 11g sugar per stick for $1.47/serving. Genuinely useful for illness or heavy sweat, skippable for daily sipping or keto. - [LMNT vs Liquid I.V. (2026): The Sodium & Sugar Numbers Compared](https://verifiedsupplementdata.com/electrolytes/lmnt-vs-liquid-iv/): LMNT vs Liquid I.V., compared on the numbers that matter: sodium, sugar, magnesium, cost per serving, and third-party testing. Built for different jobs. - [LMNT vs Nuun (2026): High-Sodium Stick vs Low-Sodium Tablet](https://verifiedsupplementdata.com/electrolytes/): LMNT vs Nuun Sport by sodium strategy: a 1,000mg heavy-sweat stick vs a 300mg everyday tablet. Cost per serving and per 100mg sodium compared. ### embed - [30% of Amazon's best-selling supplements use suboptimal forms — Verified Supplement Data](https://verifiedsupplementdata.com/embed/stat/amazon-form-audit/) - [40-90% of unsupplemented vegans are B12 deficient — Verified Supplement Data](https://verifiedsupplementdata.com/embed/stat/b12-vegan-deficiency/) - [20% of premenopausal women are iron deficient — Verified Supplement Data](https://verifiedsupplementdata.com/embed/stat/iron-women/) - [~50% of Americans don't meet the RDA for magnesium — Verified Supplement Data](https://verifiedsupplementdata.com/embed/stat/magnesium-intake-gap/) - [65% higher risk of magnesium deficiency for PPI users — Verified Supplement Data](https://verifiedsupplementdata.com/embed/stat/ppi-magnesium-risk/) - [$63B+ US supplement market size (2026) — Verified Supplement Data](https://verifiedsupplementdata.com/embed/stat/supplement-market-size/) - [42% of Americans are vitamin D deficient — Verified Supplement Data](https://verifiedsupplementdata.com/embed/stat/vitamin-d-deficiency/) - [82% of Black Americans are vitamin D deficient — 2x the general rate — Verified Supplement Data](https://verifiedsupplementdata.com/embed/stat/vitamin-d-racial-disparity/) ### essential-amino-acids - [Essential Amino Acids (EAA): What They Actually Do, Honestly Explained](https://verifiedsupplementdata.com/essential-amino-acids/): Free-form EAAs stimulate muscle protein synthesis more than an equivalent amount of intact protein, gram for gram (ISSN Position Stand, PMID 37800468) — the real edge over BCAA-only products. But whey is already ~45-50% EAA, so for anyone eating adequate protein, EAAs mostly buy speed and convenience, not a bigger outcome. - [Do EAAs Help Older Adults Build or Keep Muscle? The Trial Evidence](https://verifiedsupplementdata.com/essential-amino-acids/): EAAs show a real acute muscle-protein-synthesis signal in older adults, but Godard 2002 found no added 12-week strength or size benefit over training alone. - [Best EAA Supplement 2026: Powder vs. Capsules, Ranked by Cost per Gram](https://verifiedsupplementdata.com/essential-amino-acids/best-overall/): EAAs work, but so does the protein you already eat. Bulk powder is a fraction of the premium-capsule price for the same aminos. Ranked by cost per gram. - [EAA Dosage: The 1.5-3g Trigger vs the 15-18g "Plateau"](https://verifiedsupplementdata.com/essential-amino-acids/): EAA dosage, honestly: 8-10g/day is the typical retail range. The ISSN's own numbers put the muscle-protein-synthesis trigger at 1.5-3g and a plateau around 15-18g — most retail servings sit comfortably inside that range. But whey is already ~45-50% EAA, so a standalone EAA product is solving a gap most adequately-fed people don't have. - [EAAs vs. BCAAs vs. Whey Protein: Which One Do You Actually Need?](https://verifiedsupplementdata.com/essential-amino-acids/): EAAs produce the biggest early anabolic-signaling response of the three (Moberg 2016: Placebo