Alcar 500 - acetyl-L-carnitine from SAN. Composition Nutrient content per serving, 1 caps: Acetyl-L-carnitine (as Acetyl-L-carnitine HCl) 500 mg Ingredients: Gelatin (capsule shell), calcium carbonate, silica, magnesium stearate. Directions for Use Take Alcar 500 from SAN in 1 capsule.