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For hair growth, be sure to get a balanced diet with Vitamin C, Biotin (i.e. Vitamin B7 or Vitamin H) and Niacin (Vitamin B3). If you cannot get enough of these vitamins in your diet, you may need to take a vitamin supplement for hair growth.
Vitamins that Prevent Hair Loss. Hair loss can be caused by a lot of different factors, but two of the most common ones are stress and vitamin deficiency. Stress is a very difficult issue to deal with, and itâs even more difficult if your body is malnourished or your diet is lacking sufficient vitamin content.