text: what helps to grow hair black and thick?   you might want to consider a vitamin supplement with b complex vitamins and pantothenic acid, biotin, choline and inositol.  it would only really help if you have a deficiency in one of those.  if you are a vegetarian it is hard to get enough biotin (primary source is meat), or if you have a typical american diet, you might be deficient in the other ones (best source is cruciferous (cabbage, broccoli) vegetables and dark green leafy vegetables).    for some unknown reason, shaving any part of the body other than the head seems to stimulate thick regrowth in both men and women.    hope this helps!