L-Carnitine Fumarate
A carnitine salt that’s a delivery form of l-carnitine. Fumaric acid is a Krebs Cycle intermediate and food additive. L-Carnitine Fumarate is promoted in some ads as THE most bioavailable form of l-carnitine, but a 2005 study on piglets demonstrated that the bioavailability of the most common carnitine salts was about the same.