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.