but take care not to exceed the recommended daily amount (RDA), as overdosing can be potentially harmful. Water-soluble vitamins however, like vitamin C, B1 (thiamine), B2 (riboflavin), B3 (niacin ...

The RDA for vitamin E for adults is 15 milligrams ... Several vitamin and mineral supplements are marketed for skin health. However, research doesn't support the use of oral vitamin supplements ...