will biotin for thinning hair on head increase hair growth on legs

Had lhr (6 sessions) and moderate sucess (70%) but want to know if I take biotin because of accelerated thinning then falling out of hair on my head, will that increase the growth of hair on my legs and other areas. I was a very hairy child/girl and had electrolosis done on my face and arms as a teenager and was very sucessful and am aprehensive about taking anything to increase hair growth except on my head. My PC doctor is running tests, have been on thyroid for 40+ yrs. My derma suggested monixidil for the hair on my head. Hope someone can give me guidance. Too much hair on my legs and not enought hair on my head. I really do not know how to work this forum so I hope I am responding and posting correctly.