What is the difference between L-carnitine and L-carnitine tartrate?

L-carnitine is a naturally occurring amino acid that helps the body produce energy. L-carnitine tartrate is a specific form of L-carnitine that is commonly used in supplements. The main difference between the two is that L-carnitine tartrate is a combination of L-carnitine and tartaric acid, which may affect its absorption and effectiveness in the body.