MET-Rx L-Carnitine 1000 mg per serving is one of the most versatile supplements available. It's an ideal choice for runners, weightlifters, athletes and anyone trying to get into better shape.* L-Carnitine is an important amino acid that helps the body convert food to energy – providing support for endurance exercise (aerobic), and during recovery from high intensity activities, such as weightlifting and sprinting (anaerobic).* Supplementing with MET-Rx L-Carnitine helps to maximize muscle carnitine concentrations at the gym or before athletic competitions, so you can keep working towards your fitness goals.*