Vitamin B12 is one of the 8 vitamins from the 'B' group, and it is the most chemically complex of them. It is also important for the immune system and plays a role in the process of cell division. Active Ingredients Acerola Cherry, Parsley, Blackcurrant, Elderberry, Rosehip Bio-Culture Blend, Vitamin B3 (Niacin), B5, B6, C Iron, Vitamins: A, B1, B2, B3 (Niacin), B5, B7 (Biotin), B9 (Folic Acid), B12, C, D, E D-Mannose Fish Oil, Vitamin E.