L carnitine for metabolism Lifehack 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 Both taurine and L carnitine play roles in muscle function, and their combination could potentially enhance muscle health, recovery and weight management., Dr. Thacker breaks down the differences of Top 7 L Carnitine L Tartrate Uses for Fat Loss