L Carnitine 3000, Orange Mango, 15.72 fl oz (465 ml) L Carnitine Boost: Does It Work? Navo Did you know L carnitine, a vital amino acid, is naturally produced by your body and found in various foods? While acetyl L carnitine (ALCAR) can be a beneficial supplement for some, most people get L Carnitine Zinc rovymedx From brain to muscle, L Carnitine plays a key role in energy metabolism, endurance, and recovery by supporting efficient fat to energy conversion.