Carnitine is a nitrogen-containing compound that assists in fat metabolism. Carnitine plays an essential role in making fatty acids available for muscle tissue, and promoting muscular energy. Out of all the muscles, the heart in particular is reliant on Carnitine for the production of energy from fat. The typical US diet supplies approximately 100 mg of Carnitine per day...a daily serving of L-Carnitine caplets from Sundown provides 10 times that amount.!