21ST Century’s B-COMPLEX formula is a very special kind of B-Complex formula since apart from the usual B-Vitamins like B1, B2, Niacin (B3),Pantothenic acid (B5), Pyridoxine (B6), PABA, Folic acid and B12, it contains the three vital lipotropic “liver health” nutrients – Methionine, Choline & Inositol.