How safe is carnitine?
L-carnitine is very safe, simply because it is already a crucial constituent of almost every cell in our bodies. It is consumed whenever meat and dairy products are eaten. People are advised not to use other forms of carnitine, particularly D,L-carnitine, which reduces L-carnitine levels of skeletal and heart muscle, leading to muscle pain and decreased exercise tolerance. The maximum safe dosages for young children, pregnant or nursing women, or those with severe liver or kidney disease have not been established. High doses may cause diarrhea and heartburn in humans. Pets that are taking anticonvulsants, particularly phenytoin (Dilantin) or phenobarbital, may need extra carnitine, especially those with heart disease. Where do I obtain carnitine and do I need a prescription? Your veterinarian may have preferred supplements that he or she will recommend. Carnitine is available over-the-counter, often combined with other supplements that also improve energy production in the mitochondria
