Optimum Nutrition Micronized Creatine Powder Review

Creapure is Alzchem's German-made creatine monohydrate and a fair quality mark when a label prints it. ON's label and listing do not (checked Oct 6, 2026), so the source is not stated. Once dissolved in the gut, any creatine monohydrate delivers the same molecule to muscle. Buy plain monohydrate at 5 g a day.

Optimum Nutrition has run their creatine product for 30+ years with no recalls, no formulation changes, and consistent batch QC. That's the brand-track-record floor that makes ON the safe default for first-time buyers who don't want to think hard. NOW Sports (#7) is another household-brand monohydrate and a fine alternative if ON is out of stock — but ON is the household name that ships consistently.

Skip the load. Loading (20 g/day × 5-7 days) reaches saturation in a week; no-load (5 g/day continuously) reaches the same saturation in 3-4 weeks. The endpoint is identical. Loading causes more GI upset and acute water retention, and is the single biggest reason new users quit creatine — they assume the bloating is permanent. For 95% of buyers: 5 g/day every day, full stop. The 120-serving tub then lasts 4 months.

Mixes cleanly in cold water with 10-15 seconds of stirring — the micronized particle size makes that the case. A shaker bottle dissolves it faster (3-5 seconds) but isn't required. The cleanest protocol: scoop into 200-300 ml cold water, stir or shake, drink immediately. A small amount of fine sediment may settle if it sits too long — that's normal monohydrate behavior, not a quality issue.

Once you're saturated (week 3-4), timing barely matters — total daily intake is what counts. During the saturation phase, carbs at dosing time modestly improve uptake via insulin. Practical protocol: scoop into your post-workout protein shake on training days, or stir into water with breakfast on rest days. The point is consistency — daily dosing including rest days keeps saturation steady.

Yes, in healthy adults. The Cooper 2012 safety review covered 30+ controlled trials and found no adverse effects on kidney function, liver enzymes, or muscle integrity at 3-5 g/day chronically. One-year continuous-use studies show the same. Serum creatinine rises modestly (a downstream metabolite of supplemented creatine, not a sign of kidney damage). There is no published evidence that cycling creatine improves outcomes — just keep taking it.

1. [1] Kreider 2017 PMID 28615996 — International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine. ISSN position statement after reviewing 500+ studies: creatine monohydrate is the most effective form, with no evidence that alternative forms (HCl, ethyl ester, magnesium chelate) outperform it at equivalent doses. 3-5 g/day chronic dosing is safe and effective for healthy adults — the protocol Optimum Nutrition's 5 g scoop is designed around.
2. [2] Buford 2007 PMID 17908288 — International Society of Sports Nutrition position stand: creatine supplementation and exercise. Predecessor ISSN position statement establishing creatine monohydrate as the most extensively studied and clinically effective form. Confirms safety at 3-5 g/day chronic dosing and identifies muscle phosphocreatine saturation as the mechanism behind strength and power gains.
3. [3] Cooper 2012 PMID 22817979 — Creatine supplementation with specific view to exercise/sports performance: an update. Comprehensive safety and efficacy review covering 30+ controlled trials. Established that chronic creatine supplementation at 3-5 g/day has no adverse effects on kidney function, liver enzymes, or muscle integrity in healthy adults — the safety floor underwriting the no-cycle protocol on this tub.
4. [4] Volek 1997 PMID 9216554 — Creatine supplementation enhances muscular performance during high-intensity resistance exercise. Seminal RCT showing that creatine supplementation significantly increased peak power output and total work during high-intensity resistance exercise. The methodological template for the hundreds of subsequent trials that established creatine's strength + power effect.
5. [5] Rae 2003 PMID 14561278 — Oral creatine monohydrate supplementation improves brain performance: a double-blind, placebo-controlled, cross-over trial. Demonstrated that creatine monohydrate supplementation improved working memory and intelligence test scores vs placebo in vegetarian subjects. Establishes the cognitive co-benefit of creatine beyond pure strength outcomes — relevant for ON buyers who eat plant-forward.
6. [6] Antonio 2021 PMID 33557850 — Common questions and misconceptions about creatine supplementation: what does the scientific evidence really show?. Comprehensive myths-review covering creatine forms (HCl, ethyl ester, multi-form blends), cycling protocols, kidney safety, and water retention. Confirms that no alternative form has been shown to outperform monohydrate at equivalent doses — the evidence base for a plain monohydrate like this one.