By Patty Weasler, RN, BSN Published on June 23, 2023 Medically reviewed by Roxana Ehsani, MS L-carnitine—also known as levocarnitine—is an amino acid that occurs naturally in the body and is available as a supplement. It is a subtype of the substance carnitine, which aids in metabolism, and can be used to prevent a lack of carnitine. L-carnitine produces...
