What is L-Carnitine L-Tartrate? L-Carnitine is an amino acid found naturally in the body. There are various formats of L-Carnitine available, but BULK POWDERS™ have opted to use an "L-Tartrate" ester, as this is the purest format available. In addition, these capsules are a huge 1000mg each, ensuring you get maximum performance & health benefits from this fantastic nutrient &, as always, at the absolute lowest price! L-Carnitine is well known as the amino acid that enhances fat