What Is an ALCAR Supplement An ALCAR supplement is supplement containing an acetylated form of L-carnitine. L-carnitine is an amino acid that breaks down in the blood into carnitine, which helps transport fatty acids to turn them into usable energy to fuel the body. ALCAR HCl is ALCAR that has been bonded with hydrochloride (HCl) to help assist absorption. ALCAR is naturally produced by the body, but supplements may enhance its effect.* ALCAR Supplement Benefits ALCAR helps the body break down fatty acids into energy, which may support metabolism.* ALCAR may also have antioxidant properties.* ALCAR may help support healthy weight in conjunction with a healthy diet and exercise, as well as contribute to a sense of heightened endurance and energy.* ALCAR, when taken in conjunction with alpa lipoic acid, may help support mental clarity and focus.*