Creatine Monohydrate: Evidence, Dosing, and What Science Shows
Scientific evaluation of creatine monohydrate supplementation: what to look for in a quality product, third-party testing, and the evidence for specific formulations.
Lead Science Writer
Creatine monohydrate is the most validated sports supplement in existence. But with hundreds of products on the market, understanding what differentiates a quality creatine product from marketing noise requires examining the evidence.
What Makes a Quality Creatine Product
The single most important factor is the form: creatine monohydrate. No other form (HCl, ethyl ester, buffered, liquid) has demonstrated superiority in head-to-head trials. The ISSN explicitly states this in their 2017 position stand.
Key Quality Indicators
- Creapure certification: Manufactured by AlzChem in Germany, Creapure is the most tested creatine source. Products using Creapure raw material will display the logo.
- Third-party testing: Look for NSF Certified for Sport, Informed Sport, or USP verification. These certifications verify purity, label accuracy, and absence of banned substances.
- Micronization: Micronized creatine (200 mesh) dissolves more readily. Does not affect efficacy, but improves mixability.
- Simplicity: The best creatine products contain one ingredient: creatine monohydrate. Proprietary blends, added sugars, or "enhanced absorption matrices" are marketing, not science.
The Evidence on Specific Forms
| Form | Evidence | Verdict |
|---|---|---|
| Monohydrate | 1000+ studies | Gold standard |
| HCl | 2-3 small studies | No proven advantage |
| Ethyl ester | Inferior to monohydrate in direct comparisons | Avoid |
| Buffered (Kre-Alkalyn) | One study; no advantage over monohydrate | Marketing claim |
| Liquid creatine | Degrades in solution over time | Avoid |
Dosing Revisited
3-5g daily of creatine monohydrate. That is the entire protocol. Loading is optional (20g/day for 5-7 days to saturate faster).
Timing is largely irrelevant. Take it whenever you will consistently remember to take it. Some evidence suggests post-workout may have a marginal advantage, but consistency matters more.
Cost Analysis
Creatine monohydrate is remarkably inexpensive. At 5g/day:
- Bulk powder: approximately $0.05-0.10/day
- Branded capsules: approximately $0.30-0.50/day
- "Premium" forms (HCl, buffered): $0.50-1.00/day with no additional benefit
The cost difference over a year between bulk monohydrate and branded alternatives is $100-300 for an identical physiological effect.
Who Should Use Creatine
- Strength and power athletes (strongest evidence)
- Endurance athletes (moderate evidence for repeated efforts)
- Older adults (significant evidence for sarcopenia prevention)
- Vegetarians and vegans (larger response due to lower baseline stores)
- Anyone interested in cognitive protection (emerging evidence)
Sources: Kreider et al. (2017) ISSN Position Stand, Jagim et al. (2012) JISSN, Rawson & Persky (2007) Pharmacol Rev