Creatine monohydrate is the most researched ergogenic supplement in sports science history, with over 500 clinical trials evaluating its safety and efficacy. The International Society of Sports Nutrition classifies creatine monohydrate as the most effective ergogenic nutritional supplement currently available to athletes — and recent research has expanded its applications into cognitive health, aging, and traumatic brain injury.
Mechanism: The PCr System
Creatine is stored in muscle as phosphocreatine (PCr), which rapidly regenerates ATP during high-intensity, short-duration efforts (0–10 seconds). Creatine supplementation increases muscle PCr stores by 15–40%, extending power output of PCr-dependent efforts and accelerating PCr resynthesis during recovery intervals. This explains why creatine's performance benefits are primarily observed in activities requiring repeated maximal efforts with rest intervals — weightlifting, sprint training, team sports.
Loading vs. Maintenance Protocols
Traditional loading: 20g/day (4×5g) for 5–7 days, then 3–5g/day maintenance — saturates muscle PCr stores rapidly. Alternative: 3–5g/day for 4 weeks achieves equivalent saturation without transient GI discomfort during loading. Form: creatine monohydrate only — other forms have no superior evidence. Taking with carbohydrate or protein enhances creatine uptake through insulin-mediated transporter activity. Clinical-grade creatine is available through our nutrition catalog.
Safety: The Kidney Myth Debunked
The concern that creatine causes kidney damage originated from a single 1998 case report in a patient with pre-existing kidney disease. Subsequent 5-year longitudinal safety studies in healthy individuals found no adverse effects on kidney function at recommended doses. Creatine does increase serum creatinine — which can mislead clinicians into suspecting kidney impairment on lab review. For patients with pre-existing kidney disease, nephrologist consultation is prudent before supplementation.
