Third-Party Tested Creatine 2026: Which Are Certified
Not medical advice. This page checks products against public certification registries and the brands’ own published lab reports; it does not test products itself.
Quick answer
“Third-party tested” is four different things, and only the top two can be checked; the cheapest certified 5 g serving here costs $0.19. Of the 6 creatine products we track, 5 are in an independent certification registry (2 of them NSF Certified for Sport, 1 Informed Sport), 0 publish a lot-specific lab report without a registry listing, 0 show a report you cannot match to your tub, and 1 has nothing we could check.
Cheapest certified: NOW Sports Creatine Monohydrate Powder, $0.19 per 5 g, listed in the Informed Sport / Informed Choice registry as “NOW Sports Creatine Monohydrate Powder”. Most assurance: Momentous Creatine Monohydrate, NSF Certified for Sport, Informed Sport plus a lot-specific public lab report, $0.48 per 5 g. See every product on the ladder →
Every creatine we track, on the verification ladder
Original research6 creatine products checked, one by one, against the NSF/ANSI 173 finished-product registry (3,053 listings, snapshot 2026-08-25), the USP Verified list (159 products) and the Informed Sport / Informed Choice database (2,105 products), then each brand’s own site for a published certificate of analysis (2026-09-19). A match means the exact product and form, never the brand alone.
Method: the roster is every product in our catalog for this category with a live Amazon offer. Registry matches are exact-product matches (name, form and, where the registry lists it, flavour) against our snapshots, never a brand-level match; the certificate check read each brand’s own site for a published, lot-specific certificate of analysis. A product whose brand site blocked the check is recorded as unverified, not as failing. Cost is computed from the current Amazon price of the exact container and the dose on its Supplement Facts panel.
The rung is decided by what a buyer can look up, not by what the label says. Rung 1 means the exact product appears in a certifier’s public registry; the listing text is quoted so you can find it. Rung 2 means the brand publishes a certificate of analysis for a specific lot. Rung 3 is a lab report with no lot to match. Rung 4 is a claim, silence, or a brand site that blocked our check. Within a rung, products are ordered by cost per 5 g serving.
| Product | Rung | Certification registry | Published lab report | Label says | Cost per 5 g | Buy |
|---|---|---|---|---|---|---|
| NOW Sports Creatine Monohydrate Powder | 1 · Certified | Informed Sport / Informed Choice "NOW Sports Creatine Monohydrate Powder" · registry | claim, no document found | NPA GMP Certified | $0.19 | Check price |
| BulkSupplements Micronized Creatine Monohydrate | 1 · Certified | NSF/ANSI 173 "CREATINE MONOHYDRATE POWDER UNFLAVORED" · registry | brand site blocked our check | cGMP Facility, Third-Party Tested | $0.22 | Check price |
| Momentous Creatine Monohydrate | 1 · Certified | NSF/ANSI 173 "Creatine Monohydrate" · registry | Lot-specific report, SGS (heavy metals, ICP-MS); GLUTENRIDA/Eurofins (gluten allergen); general site copy also names Eurofins, Light Labs, NSF Certified for Sport (identity/potency (label-claim match), gluten allergen, microbial (Total Plate Count, Yeast and Mold, Salmonella, E. coli, S. aureus), heavy metals (Arsenic, Lead, Cadmium, Mercury via ICP-MS, 'Report Only' on newer lots, no pass/fail limit)) · view | NSF Certified for Sport, Informed Sport | $0.48 | Check price |
| Thorne Creatine | 1 · Certified | NSF/ANSI 173 "Thorne® Creatine" · registry | claim, no document found | NSF Certified for Sport | $0.49 | Check price |
| Transparent Labs Creatine HMB | 1 · Certified | NSF/ANSI 173 "Creatine HMB Black Cherry" · registry | Lot-specific report, Advanced Laboratories (heavy metals/microbial, FDA Reg #14353128308); Light Labs, Ann Arbor MI (creatine potency/identity, HPLC) (heavy metals (Arsenic, Cadmium, Mercury, Lead via ICP-MS, USP <730>), microbial (Total Aerobic Microbial Count, Coliform, E. coli, Staph aureus, Salmonella, Yeast & Mold), identity/potency (creatine monohydrate content via HPLC, 5.48 g/serving vs 4,500-6,000mg label range, in-spec)) · view | Informed Choice Certified | $1.67 | Check price |
| Optimum Nutrition Micronized Creatine Monohydrate | 4 · Unverified | not found in NSF, USP or Informed Sport listings | claim, no document found | Banned Substance Tested | $0.27 | Check price |
Registry listings are from our snapshot of each registry on the date shown; a listing can be added or withdrawn after that date, so confirm the lot on your tub against the live registry before relying on it. Prices are the current Amazon price divided by servings.
What each mark actually checks
NSF/ANSI 173 (the “NSF Contents Certified” mark, listed at info.nsf.org) verifies that the label is accurate, that contaminants such as heavy metals and microbes are within limits, and audits the manufacturing facility. NSF Certified for Sport is the same program plus a screen of every lot for more than 280 substances banned by major athletic organizations; it is the mark most professional leagues and anti-doping bodies name. USP Verified checks identity, potency and contaminants, that a tablet or capsule dissolves, and audits manufacturing to USP’s standard; its list is short (159 products in our snapshot) and dominated by a few large brands. Informed Sport tests every batch for banned substances at an ISO 17025 laboratory and publishes the batch; Informed Choice tests retail samples on a schedule instead of every batch. None of these programs measures whether creatine works; they measure whether the tub contains what it says.
Why it matters even for a simple molecule: when researchers bought 57 sports supplements listing botanical stimulants and analysed them, 89% were inaccurately labelled and 12% contained an FDA-prohibited ingredient (Cohen 2023, PMID 37459101). A review of contamination in US supplements reached the same practical conclusion for athletes: until regulation changes, use third-party-certified products (Mathews 2018, PMID 28850291). Creatine monohydrate itself is among the best-studied and safest supplements there are, at 3 to 5 g a day (Kreider 2017, PMID 28615996); certification is about the tub, not the molecule.
Which creatine to buy
Product links go to Amazon and we may earn a commission if you buy. It never changes which product we pick or what we say about it. How we choose.
How to check your own tub
- Find the lot number, usually stamped on the bottom or near the seal.
- NSF: search the product at info.nsf.org (NSF/ANSI 173) or nsfsport.com (Certified for Sport). The listing names the exact product and form.
- Informed Sport / Informed Choice: search the brand at sport.wetestyoutrust.com; each product page lists tested batches.
- USP Verified: the list is at quality-supplements.org.
- Brand COAs: the “view” links in the table go to the report pages we found; match your lot number. A report without a lot number is rung 3, not rung 2.
Frequently asked questions
Which creatine supplements are third-party tested?
Of the 6 creatine products we track, 5 are listed in an independent certification registry as of 2026-08-25: NOW Sports Creatine Monohydrate Powder (Informed Sport / Informed Choice); BulkSupplements Micronized Creatine Monohydrate (NSF/ANSI 173); Momentous Creatine Monohydrate (NSF/ANSI 173); Thorne Creatine (NSF/ANSI 173); Transparent Labs Creatine HMB (NSF/ANSI 173). Optimum Nutrition Micronized Creatine Monohydrate says "tested" on the label with no registry listing and no document we could find.
What is the cheapest certified creatine?
NOW Sports Creatine Monohydrate Powder at $0.19 per 5 g serving at current Amazon prices, listed as "NOW Sports Creatine Monohydrate Powder" in the Informed Sport / Informed Choice registry. It is also the cheapest creatine we track, so certification costs nothing here.
What is the difference between NSF Certified for Sport, NSF/ANSI 173, USP Verified and Informed Sport?
All four are independent programs that test finished products and audit the factory; the difference is what they test for. NSF/ANSI 173 checks that the label is accurate and contaminants are within limits. NSF Certified for Sport adds a screen of every lot for more than 280 substances banned by major athletic organizations. USP Verified checks identity, potency, contaminants and that the pill dissolves, and audits manufacturing. Informed Sport tests every batch for banned substances at an ISO 17025 laboratory; Informed Choice tests retail samples of the product on a schedule rather than every batch. A product in any of these registries is on rung 1 of our ladder; the registry, not the logo on the tub, is the evidence.
Does "third-party tested" on a creatine label mean anything?
On its own, no. The phrase has no legal definition, and a brand can print it after sending one sample to a lab once. The question to ask is whether you can check: is the product in a certifier's registry, or does the brand publish a certificate of analysis with a lot number you can match to your tub? Creatine monohydrate is a simple molecule and adulteration is rarer than in the botanical sports-supplement aisle, where a 2023 analysis found 89% of products mislabelled and 12% containing FDA-prohibited ingredients (Cohen 2023), but the same rule applies: evidence you can look up beats a claim.
Do I need certified creatine if I am not a tested athlete?
Not for safety in most cases; creatine monohydrate from a reputable manufacturer is well studied and the International Society of Sports Nutrition position stand calls it safe at the standard 3 to 5 g a day. Certification buys assurance that the tub contains what it says and nothing banned, which matters if you are drug-tested, pregnant, or simply want to stop wondering. When the certified product is also the cheapest, as it is here, there is no trade-off to make.
How do I check my own tub?
Look for the lot number on the tub. For NSF, search the product at info.nsf.org or nsfsport.com; for Informed Sport, search the brand at sport.wetestyoutrust.com and the lot on the product's page; for USP, check quality-supplements.org. For a brand that publishes certificates of analysis, find the COA page on its site and match the lot number. If none of those works, you are trusting the label.
Related guides
- Best creatine, ranked
- Momentous vs Thorne creatine and Thorne vs Optimum Nutrition
- Creatine without fillers
- How few supplements are certified at all: the registry audit
- Creatine dosage guide
Sources
- NSF. NSF/ANSI 173 Dietary Supplements, certified finished products listing. info.nsf.org (snapshot 2026-08-25, 3053 listings) and NSF Certified for Sport program. nsfsport.com
- USP. USP Verified Dietary Supplements, verified products list. quality-supplements.org (159 products)
- LGC. Informed Sport and Informed Choice certified product search. sport.wetestyoutrust.com (2105 products)
- Brand certificate-of-analysis and quality pages linked in the table, each checked 2026-09-19.
- Cohen PA, et al. “Presence and Quantity of Botanical Ingredients With Purported Performance-Enhancing Properties in Sports Supplements.” JAMA Netw Open. 2023. PMID: 37459101
- Mathews NM. “Prohibited Contaminants in Dietary Supplements.” Sports Health. 2018. PMID: 28850291
- Kreider RB, et al. “International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine.” J Int Soc Sports Nutr. 2017. PMID: 28615996