WHAT ARE L-CARNITINE L-TARTRATE CAPSULES 1000mg? L-Carnitine is an amino acid found naturally in the body; Carnitine synthesis occurs primarily in the Liver. There are various forms of L-Carnitine available, but BULK POWDERS™ have opted to use an L-Tartrate" ester, as this is the purest format available. Carnitine can be found naturally in the diet, predominately in meat an…[1000]"