L-Carnitine is the chief amino acid that helps the body convert fats into energy. It can be stored in many areas, from the muscles and the brain, to the heart, and sperm, but it is manufactured by the kidneys and liver. L-carnitine is generally found in meats. While fruits and vegetables do have trace amounts, the greatest amount is found in meat. Usually the body can make its own carnitine without interruption. However, some may have conditions or deficiencies which cause them to be lacking in sufficient creatine, for these people, supplementation may be necessary. Acetyl-L-Carnitine is available to the public without a prescription. Not only does it provide the body with carnitine, but also with the acetyl groups which help eventually create acetylcholine.