Solgar's Formula B-Complex 50 is a dietary supplement that contains all the essential B vitamins and unessential choline, biotin and inositol. B vitamins contained in the Formula B-Complex are essential nutrients for the release of energy from food, the smooth functioning of the nervous system and the healthy condition of skin, hair and eyes. B vitamins are also important for the balance of hormones, for good blood circulation, a strong immune system and help the body cope in stressful situations.