CoQ10 l-Carnitine fumarate 120ct by Pure Encapsulationsl Carnitine fumarate, recommended by leading U. S. cardiologists, is combined with CoQ10 for advanced cardiovascular energy support. In addition to being one of the most bioavailable forms of carnitine, l carnitine fumarate provides fumaric acid, leading to a synergistic effect in cellular energy production in the mitochondria. l Carnitine shuttles fatty acids across the mitochondria membrane where they are metabolized and promote the Krebs cycle.