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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 for Hair Growth Takeaways. A major contributor to hair loss is poor nutrition, resulting in vitamin deficiencies. Studies show that women with an iron deficiency are at a higher risk of hair loss, and serum ferritin levels below or equal to 30 milligrams/milliliter are strongly associated with telogen hair loss.