Optimum Nutrition Micronized Creatine Monohydrate
America's #1 selling creatine by volume. Pure micronized creatine monohydrate powder. 5g per serving, 60 servings. Unflavored. Third-party tested for banned substances (not NSF Certified for Sport). Mixes easily in liquid.
Research last verified August 19, 2026
Ethos Score
75/ 100Score is computed from the five dimensions below using verified research inputs.
The Takeaway
America's best-selling creatine by volume. Pure 5 g creatine monohydrate at a very low per-serving cost, but no NSF certification.
Best For
- • People who want a reliable, low-cost creatine monohydrate
- • High-volume buyers looking for the best per-gram price
Watch Out For
- • No NSF Certified for Sport or equivalent certification — Informed Choice claim is from a reviewer/retailer, not ON directly
- • Creapure source is a retailer claim only
Why this score
Score covers 85% of the full 100-point weight. Dimensions with no verified input are excluded from the calculation.
5 g creatine monohydrate — the evidence-matched dose in 500+ published studies.
Pure micronized creatine monohydrate. No additives or proprietary blends. Creapure sourcing is a retailer/reviewer claim only.
No NSF, USP, or Informed Choice certification independently confirmed. Third-party testing is referenced by reviewers but not verified for this exact SKU.
No product-specific heavy metal or PFAS data located.
One of the lowest per-serving costs in the category — approximately $0.17/serving — making it accessible for daily use.
Real Cost
ON Micronized Creatine — 300g (60 Servings) · ON Micronized Creatine 300g
One-time purchase
$19.99
Cost per serving: $0.33
No verified official purchase link is available
Formula
Key Active Ingredients
Creatine (Creatine Monohydrate)
5 g1 scoop (5 g)
Testing & Transparency
Independent certification
No public certification verification is listed
Public test source
No product-specific test source is linked
No independent certification confirmed for this SKU. Third-party testing referenced by reviewers was not independently verified.
Toxin & Forever Chemical Report
This section shows product-specific contaminant and PFAS (forever chemical) test results where available. “No Product-Specific Data Found” is not a purity pass — it means no public test result was located for this exact product. Organic, non-GMO, and similar certifications are agricultural standards and do not verify contaminant levels.
No product-specific contaminant test results located.
Evidence
No structured expert findings are available for this product yet. The research summary in the score dimensions above reflects the current state of our analysis.