The complex supplies B12 for red-blood-cell formation and immune support, B1 and niacin for carbohydrate and fat metabolism, riboflavin for vision and iron metabolism, B6 for cysteine synthesis, and pantothenic acid for essential metabolic reactions. It also includes biotin for healthy hair and skin, plus choline and inositol for liver function. Adults and children over 12 take one tablet daily. Tablets are free from added sugar, salt, corn, gelatine, yeast, gluten, wheat, dairy, lactose, soya, nuts and artificial colours or preservatives.