Harris RC, Soderlund K, Hultman E. Elevation of creatine in resting and exercised muscle of normal subjects by creatine supplementation. Modica P. Creatine supplements show some sports benefit. Medical Tribune News Service. July 10, 1997. Vandenberghe K and others.
Caffeine counteracts the ergogenic action of muscle creatine loading.
Volek JS and others. Creatine supplementation enhances muscular performance during high-intensity resistance exercise. Vandenberghe K and others. Long-term creatine intake is beneficial to muscle performance during resistance training. Bosco C and others.