To improve both sprint and endurance performance. L-Carnitine is essential for normal heart function. L-Carnitine requirements are known to rise during periods of increased tissue demand. L-Carnitine may help delay muscle fatigue and improve endurance. Supplementation is recommended in the following situations: performance feeding; neonates (foals and yearlings have been found to have greater requirements for L-Carnitine); diets known to be low in Carnitine and its precursors; cardiac and skeletal muscle disease; hepatic and renal disease; debilitation, in appetence, convalescence; gastrointestinal disturbances and parasitism; derangements in fat metabolism.