Strong Evidence Amino Acid

Creatine Monohydrate

Creatine monohydrate is the most extensively studied dietary supplement in sports nutrition history, with over 500 peer-reviewed studies supporting its efficacy. It is a naturally occurring compound synthesized from three amino acids — arginine, glycine, and methionine — primarily in the liver, kidneys, and pancreas. The molecule functions by donating a phosphate group to regenerate ATP (adenosine triphosphate), the fundamental energy currency of every cell. When stored in muscles as phosphocreatine, it enables rapid ATP recycling during high-intensity, short-duration activities like sprinting and resistance training. Beyond athletic performance, emerging research highlights creatine's role in cognitive function, neuroprotection, and healthy aging. The brain is metabolically demanding, consuming roughly 20% of the body's energy at rest, and creatine supplementation appears to support cognitive performance particularly under conditions of sleep deprivation or mental fatigue.

Updated March 1, 2026

This content is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication regimen.

Benefits & Uses

Increases maximal strength by 5-10% and power output by 12-26%. Enhances high-intensity exercise capacity and lean body mass. Supports cognitive function under stress and sleep deprivation. May provide neuroprotective benefits. Increases intracellular hydration which may support protein synthesis.

Side Effects & Precautions

Initial water weight gain of 2-4 lbs during loading phase (intracellular, not bloating). Occasional mild GI discomfort at high doses. Very rarely, muscle cramping — though controlled studies have not confirmed this association. No evidence of kidney damage in healthy individuals at recommended doses.

Dosage & Administration

Loading phase (optional): 20g/day divided into 4 doses for 5-7 days. Maintenance: 3-5g/day. No cycling required. Take with a meal containing carbohydrates for improved uptake. Creatine monohydrate is the gold standard form — other forms (HCl, ethyl ester, buffered) offer no proven advantage.

Contraindications

Pre-existing kidney disease or impaired renal function. Individuals on nephrotoxic medications should consult their physician. Not recommended for children under 18 without medical supervision.

Known Interactions

Substance Type Severity Description
Caffeine minor High-dose caffeine (>300mg) may partially blunt creatine's ergogenic effects on repeated sprint performance, possibly through opposing effects on muscle relaxation time. Moderate caffeine intake is generally fine.
NSAIDs (ibuprofen, naproxen) minor Both creatine and NSAIDs are cleared through the kidneys. Concurrent chronic use at high doses could theoretically increase renal workload, though no clinical cases of harm have been documented. Stay well-hydrated.

Check interactions with other supplements

Sources

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This content is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication regimen.