Hair under chin as donor hair for facial hair transplant?

Body hair may be a donor source of hair if scalp hair is not available.  It is best to consult with a doctor to see if you would be a candidate.

Body hair grafts are more prone to scarring and more difficult to harvest. Body hairs as grafts also have lower survival rate

The best donor hair is from the back and sides of the head. The next best spot it the donor area is depleted, is under the chin as this area can yield as many as 3000 grafts in some people with a heavy beard. Beard hair taken from under the chin can't really be seen.  Other body hair has short growth periods, unlike beard and scalp hair which have long growth cycles.