Twinlab Mega L-carnitine - 500 Mg - 60 TabletsTwinlab Mega L Carnitine Description: Helps Metabolize Fat into Energy Supports Cardiovascular Function Gluten Free Mega L Carnitine nutritionally has a role in metabolizing fat into energy. L carnitine can promote muscle mass and help reduce fatigue. In the body, L carnitine is produced by the liver and kidneys and is stored in the skeletal muscles, heart and brain. L carnitine also supports cardiovascular function and helps reduce oxidative stress.