L-Carnitine and L-Tartrate are two related compounds that play important roles in human health. L-Carnitine is an amino acid that is involved in energy metabolism, and is especially important for the transport of long-chain fatty acids into the mitochondria, where they are burned for energy. On the other hand, L-Tartrate is a salt that is derived from tartaric acid and is used to increase the bioavailability of L-Carnitine in the body.
Both L-Carnitine and L-Tartrate are found in small amounts in some foods, including red meat, dairy products, and avocados, but they can also be taken as supplements to boost their levels in the body.