what are the vitamins that are good for hair?
['Vitamin A. All cells need vitamin A for growth. ... ', 'B-Vitamins. One of the best known vitamins for hair growth is a B-vitamin called biotin. ... ', 'Vitamin C. Free radical damage can block growth and cause your hair to age. ... ', 'Vitamin D. ... ', 'Vitamin E. ... ', 'Iron. ... ', 'Zinc. ... ', 'Protein.']