Creatine
Creatine Monohydrate
Foundational Supplements
CAS
57-00-1
Molecular Weight
131
Da
Human RCT
The most extensively researched performance supplement in existence with over 500 peer-reviewed studies and the strongest evidence grade in this catalog. Naturally produced in the body and consumed through red meat and fish, creatine increases muscle phosphocreatine stores to extend high intensity exercise capacity, accelerate strength gains, and support lean muscle development. Emerging evidence supports cognitive and neuroprotective benefits. OTC, widely available, exceptionally safe profile validated across decades of research. No prescription required.
Oral
Intranasal Suitable
No
OTC Supplement
Community Signal
Community consensus is as strong as it gets for any compound in the catalog. It may be the most thoroughly validated supplement by anecdotal agreement. r/Fitness, r/Supplements, and r/Nootropics all treat it as a baseline recommendation, often described as "the one thing everyone agrees on." Strength and power output gains are reported consistently across training styles. Cognitive benefit reports have grown meaningfully in recent years, particularly among users taking it for brain fog rather than athletic performance. The main debate is between monohydrate and newer forms like HCl, the community has broadly converged on monohydrate as the cost-effective standard, consistent with the RCT data. Loading protocols are contested; most experienced users report equivalent outcomes with or without a loading phase.
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What It Is
Creatine is a naturally occurring compound synthesized in the human body from three amino acids, arginine, glycine, and methionine, primarily in the liver, kidneys, and pancreas. It is also consumed through dietary sources, particularly red meat and fish. Approximately 95% of the body's creatine is stored in skeletal muscle as phosphocreatine, with the remaining 5% found in the brain, heart, and testes. First identified in 1832 by French scientist Michel Eugène Chevreul, creatine became one of the most widely studied sports supplements following its popularization after the 1992 Barcelona Olympics. It is the single most researched performance supplement in existence with over 500 peer-reviewed studies supporting its efficacy and safety, making it the strongest evidence base of any compound in this entire catalog.
Mechanism of Action
Creatine's primary mechanism centers on the phosphocreatine energy system. During high intensity exercise the body's primary energy currency, ATP (adenosine triphosphate), is rapidly depleted. Phosphocreatine donates its phosphate group to ADP (adenosine diphosphate) to rapidly regenerate ATP, extending the duration of high intensity effort before fatigue sets in. Supplemental creatine increases muscle phosphocreatine stores by approximately 20-40%, directly increasing the capacity for repeated high intensity efforts. Secondary mechanisms include cell volumization through water retention in muscle cells, which may stimulate protein synthesis, and emerging evidence for neuroprotective effects through maintenance of brain ATP levels and reduction of oxidative stress.
Use Cases
Creatine has the most robust human RCT evidence base of any compound in this catalog. Well established benefits include increased strength and power output in resistance training, improved performance in repeated sprint and high intensity interval efforts, acceleration of lean muscle mass gains when combined with resistance training, enhanced recovery between training sessions, and increased muscle endurance. Emerging and well-supported evidence exists for cognitive benefits particularly under conditions of sleep deprivation or mental fatigue, neuroprotection in aging populations, and potential therapeutic applications in neurodegenerative conditions including Parkinson's disease and traumatic brain injury. It is appropriate for a remarkably wide range of populations from elite athletes to older adults seeking to preserve muscle mass and cognitive function.
Known Risks
Creatine monohydrate is one of the most safety-validated supplements in existence. Decades of research at doses of 3-5g daily have found no clinically significant adverse effects in healthy individuals. The longstanding myth that creatine causes kidney damage has been thoroughly refuted in the literature, multiple long-term studies in healthy individuals show no negative renal effects. Common experiences during loading phases include water retention and minor gastrointestinal discomfort, both of which resolve with dose reduction or switching to a maintenance dose protocol. Individuals with pre-existing kidney disease should consult a physician before supplementing as a precaution. Creatine draws water into muscle cells, adequate hydration is recommended. Safe for adolescents and older adults at standard doses.
Available Forms
Oral powder (most common and best studied), capsules, and tablets. Creatine monohydrate is the gold standard form, it is the most studied, most affordable, and as effective as any alternative form despite aggressive marketing of proprietary variants like creatine HCL, buffered creatine, and creatine ethyl ester. Third party tested creatine monohydrate from reputable brands is the recommended choice. Micronized creatine monohydrate dissolves more easily in water and may reduce gastrointestinal discomfort for sensitive individuals. No injectable form, oral supplementation is fully effective.
Regulatory Status
OTC dietary supplement. No prescription required. Regulated under DSHEA in the United States. Not prohibited by WADA or any major sports governing body, legal in all competitive sports. Widely available through mainstream retail, grocery stores, and online at very low cost. One of the most affordable and accessible compounds in this entire catalog.
Sources
https://pubmed.ncbi.nlm.nih.gov/14636102/
https://pubmed.ncbi.nlm.nih.gov/27328852/
https://pubmed.ncbi.nlm.nih.gov/35688360/
Similar Compounds
Turkesterone, MK-677, Beta-alanine
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