essential part

The most essential hair vitamin is vitamin A but the best form of this is to include in the diet is beta-carotene. This is because vitamin A can be toxic if consumed in large quantities but beta-carotene has no such problems and is converted by the body into vitamin A that can be used to promote healthy hair. Of course, vitamin A is not just a hair vitamin, it is also needed for a number of other functions including maintaining healthy eyesight, normal growth of bones, skin, nails and the protective sheath surrounding nerve fibres.