L carnitine not only for athletes. Effects and properties of L carnitine OstroVit Force Factor L Carnitine Liquid Berry 3 000 mg 16 fl oz (473 ml) Macy's 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 If you are like a lot of people, you may have never heard of carnitine but this important nutrient is critical for our body's ability to optimally burn fat required for energy.