Hair, skin, and nail supplements commonly contain antioxidants such as vitamins A, C, and E, or Coenzyme Q10, as well as biotin, a B-complex vitamin. The minerals manganese and selenium are often found in supplements marketed for healthy hair, along with fatty acids such as fish oil and flaxseed oil.Deficiencies of these nutrients, although uncommon, may cause a litany of hair—and, sometimes, skin and nail—changes. Over time, for instance, insufficient intake of vitamins A and E can cause rough, scaly skin patches. A deficiency of biotin may cause eczema and hair loss. In Vitamins.lv, you are able to purchase these nutrients either seperately or in complex formulas.