Fumarate

The salt or ester of fumaric acid, a dicarboxylic acid and a naturally occurring intermediate in the Krebs (citric acid) cycle. Fumarate appears in the YNP catalogue as a salt form of L-Carnitine (L-Carnitine Fumarate) and is also used as a food acidulant (fumaric acid/fumarate, Codex INS 297). In L-Carnitine Fumarate, the fumarate component is the counter-ion providing stability — the L-Carnitine component provides the biological activity.