My friend is 27, and loves to have a beard, unfortunately, he doesn't grow it on most of his face. what can he do to gain hair?

Hair bulbs: Hair only grows where there are hair follicles and bulbs under the skin. The density and distribution of facial and other hairs is genetically determined. The way around this issue of sparse beard would be a hair transplant into the areas where the hair is sparse.

The most: important factor in determining facial hair growth, assuming testosterone levels are normal, is genetics -- and you can't change that. Certain races, like the American Indians, have almost no facial hair, while south Europeans generally have a lot.