L-CARNITINE is an amino acid (a building block for protein) that is naturally produced in the body. It helps our system convert food in energy, reducing fatgue and providing support for endurance exercises and fast recovery from high-intensity activities so you can build lean muscle and get that extra boost you need while working out. It's also important for healthy heart and brain functions or muscle movement. Optimize the benefits of your active lifestyle today with L-Carnitine.