Force Factor L Carnitine Liquid Orange 3 000 mg 16 fl oz (473 ml) Macy's 6 potential benefits of l carnitine Good Food What Is Carnitine and Why Is It Important? The Amino Company L carnitine is a naturally occurring amino acid structure that is made in the human brain, liver, and kidneys. L carnitine plays a critical role in energy production, as it converts fat into energy. 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