Healthaid biotin 800ug b vitamins play an important role either individually or in combination in the metabolic utilisation of food fats carbohydrates and protein and are vital to the health of the nervous system they are also essential for healthy eyes skin hair and nails healthaid provides a comprehensive range of individual and b complex vitaminshealthaid biotin 800ug 9sometimes called vitamin h or co enzyme r biotin is not really a vitamin at all but does work together in the bod