Creatine is a naturally occurring compound found in skeletal muscle (and the brain) that is obtained from meat and fish as well as being produced naturally by the body. There is large individual variation in creatine levels due to gender, age and dietary habits (vegetarians have lower levels of muscle creatine than meat eaters).
Creatine has a role in the regulation of energy production and acts indirectly to help supply the body with ATP (the body’s fuel currency). Increased creatine stores can potentially enhance fatigue resistance and lead to performance improvements during high-intensity, brief duration (<30 second) activities with short recovery periods. It should be noted individual responses to creatine are varied individuals with the lowest starting creatine stores having the greatest potential for a response to supplementation.