USP Verified: the products we track that are listed
Quick answer
22 of the 1158 supplements we track are individually listed under USP Verified, across 21 categories and 4 brands. The registry holds 159 listings from 16 brands. Cheapest per day of its studied dose: Nature Made Iron 65 mg at $0.020.
Best USP Verified pick: Nature Made Magnesium Glycinate 200mg, $11.70 ($0.73 a day, Magnesium glycinate). Check price →
Not medical advice. Matched by product name to the public registry (www.quality-supplements.org/usp_verified_products). A listed flavour or size does not certify the others.
What the mark checks, and what it does not
Checks: the product contains the ingredients listed on the label in the declared amounts, is free of harmful levels of specified contaminants, breaks down and releases into the body within a specified time, and is made under FDA cGMP.
Leaves out: it says nothing about effectiveness, and USP verifies fewer than two hundred products in total.
Verify it yourself: quality-supplements.org → USP Verified products list; the USP mark is printed on the bottle.
Safety: some products listed here give more than the adult upper limit in one serving: vitamin D4,000 IU a day (NIH). Do not take more than that unless your doctor tells you to.
Every USP-listed product we track
| Product | Category | Registry listing | Cost/day | Buy |
|---|---|---|---|---|
| Nature Made Iron 65 mg Nature Made | Iron sulfate | as “Nature Made Iron 65 Mg Tablets” | $0.020 | Check price → |
| Nature Made Calcium, Magnesium and Zinc with D3 Nature Made | Calcium | USP Verified | $0.030 | Check price → |
| Nature Made Melatonin 3 mg Nature Made | Melatonin | as “Nature Made Melatonin 3 Mg Tablets” | $0.040 | Check price → |
| Nature Made Zinc 30 mg Nature Made | Zinc | USP Verified | $0.040 | Check price → |
| Nature Made Calcium 600 mg with D3 Nature Made | Calcium carbonate | USP Verified | $0.06 | Check price → |
| Nature Made Vitamin D3 2000 IU Nature Made | Vitamin D3 | as “Nature Made Vitamin D3 2000 IU (50 Mcg) Softgels” | $0.06 | Check price → |
| Nature Made Super B-Complex with Vitamin C Nature Made | B complex | as “Nature Made Super B-Complex With C Tablets” | $0.07 | Check price → |
| Nature's Bounty Vitamin D3 5000 IU Nature's Bounty | Vitamin D3 5000 | USP Verified | $0.07 | Check price → |
| Nature Made Vitamin C 1000 mg Extra Strength Nature Made | Vitamin c | as “Nature Made Vitamin C 1000 Mg Tablets” | $0.08 | Check price → |
| Nature Made Vitamin D3 5000 IU Nature Made | Vitamin D3 | as “Nature Made Vitamin D3 Extra Strength 5000 IU (125 Mcg) Softgels” | $0.08 | Check price → |
| Nature Made Flaxseed Oil 1000mg, Fish-Free Omega-3, 180 Softgels Nature Made | Flaxseed oil | as “Nature Made Flaxseed Oil 1000 Mg Softgels” | $0.09 | Check price → |
| Nature Made Vitamin E 180 mg Nature Made | Vitamin e | as “Nature Made Vitamin E 400 IU (180 Mg) Dl-Alpha Softgels” | $0.10 | Check price → |
| Nature Made Biotin 2500 mcg Extra Strength Nature Made | Biotin | as “Nature Made Biotin Extra Strength 2500 Mcg Softgels” | $0.11 | Check price → |
| Nature Made Vitamin B6 100 mg Nature Made | Vitamin B6 | as “Nature Made Vitamin B6 100 Mg Tablets” | $0.11 | Check price → |
| Nature Made Vitamin B12 1000 mcg Sublingual Fast Dissolve Nature Made | Vitamin B12 | as “Nature Made Vitamin B12 1000 Mcg Fast Dissolve Tablets” | $0.20 | Check price → |
| Nature Made Magnesium Citrate 250 mg Nature Made | Magnesium citrate | as “Nature Made Magnesium Citrate 250 Mg Softgels” | $0.39 | Check price → |
| Nature Made Vitamin D3 5000 IU + K2 100 mcg Nature Made | Vitamin D3 5000 K2 | USP Verified | $0.42 | Check price → |
| Nature Made Vitamin K2 100 mcg Nature Made | Vitamin K2 | USP Verified | $0.44 | Check price → |
| Culturelle Daily Probiotic Culturelle | Probiotics | USP Verified | $0.59 | Check price → |
| Nature Made Magnesium Glycinate 200mg Nature Made | Magnesium glycinate | as “Nature Made High Absorption Magnesium Glycinate 200mg Capsules” | $0.73 | Check price → |
| Nature Made Magnesium Glycinate Gummies 100 mg Nature Made | Magnesium gummies | as “Nature Made High Absorption Magnesium Glycinate Gummies” | $1.05 | Check price → |
| Ritual Essential for Women 18+ Multivitamin Ritual | Multivitamin | as “Ritual Essential for Women Multivitamin 18+” | $1.23 | Check price → |
Frequently asked questions
What does USP Verified certify?
That the product contains the ingredients listed on the label in the declared amounts, is free of harmful levels of specified contaminants, breaks down and releases into the body within a specified time, and is made under FDA cGMP. What it leaves out: it says nothing about effectiveness, and USP verifies fewer than two hundred products in total.
How do I check whether a product is USP certified?
Search the exact product name at quality-supplements.org → USP Verified products list; the USP mark is printed on the bottle. 159 listings were in the registry as of Tuesday, August 25, 2026; a brand appearing there does not mean every product does.
What is the cheapest USP-listed supplement per day?
Nature Made Iron 65 mg at $0.020 per day of its studied dose (Iron sulfate).
Other programs: NSF/ANSI 173 & NSF Certified for Sport · Informed Sport / Informed Choice · by brand