Creatine Monohydrate

Mechanism of Action

Creatine is phosphorylated by creatine kinase to phosphocreatine (PCr), which serves as a rapid phosphate donor to regenerate ATP from ADP during high-intensity, short-duration activity (the phosphagen energy system). This extends maximal effort capacity by 10-20%. Beyond energy, creatine enhances satellite cell activation and myonuclear addition, increases intracellular water retention (cell volumization signals anabolism), upregulates IGF-1 locally in muscle, enhances glycogen supercompensation, and crosses the blood-brain barrier where it supports cognitive function under stress (brain PCr buffer). It also acts as a direct antioxidant, scavenging reactive oxygen species.

Dosing Protocol

Notes

Creatine monohydrate is the single most studied and effective sports supplement in history. Over 700 human studies. ISSN position stand confirms efficacy and safety. The kidney damage myth has been thoroughly debunked in healthy populations — elevated creatinine is an expected biomarker change, not organ damage. Cognitive benefits (memory, processing speed under stress) are well-documented, making creatine relevant beyond athletics. Vegetarians/vegans show the most dramatic cognitive and performance improvements (lower baseline creatine stores). No cycling needed — continuous use is safe and effective. The Creapure certification ensures heavy metal testing and purity.

Stacking

• Whey Protein
• Beta-Alanine
• EAAs
• Electrolytes
• HMB

Interactions

• NSAIDs (ibuprofen, naproxen) [MEDIUM] — Both creatine and NSAIDs may affect renal function — monitor in predisposed individuals
• Caffeine [LOW] — Early research suggested caffeine blunts creatine benefits — more recent data shows no significant interference at normal caffeine doses
• Diuretics [LOW] — Creatine increases intracellular water; diuretics decrease extracellular water — monitor hydration

Contraindications

• Pre-existing renal disease (creatinine levels will rise, which is expected and does not indicate kidney damage in healthy individuals)
• Rare: renal tubular disorders

Side Effects

• Weight gain (1-3 kg from water retention — intracellular, not bloat)
• GI discomfort at high doses
• Muscle cramping (anecdotal, not confirmed in controlled trials)
• Elevated serum creatinine (expected, benign — not indicative of renal damage)

Key Papers

• 10.1186/s12970-017-0173-z
• 10.1016/j.jtemb.2018.12.005
• 10.1177/0269881113480987

Source Quality

Creatine monohydrate (Creapure, manufactured by Alzchem in Germany) is the gold standard — most studied, cheapest, and most effective form. Micronized for improved solubility. Buffered creatine (Kre-Alkalyn), creatine HCl, and creatine ethyl ester have NOT been shown to be superior despite marketing claims. Brands: Thorne Creatine, NOW Creatine (Creapure), Optimum Nutrition.

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