Hormones
It depends why you lost your hair to begin with. However Tacrolimus does not have the side-effect of hirsutism (excessive hair growth), unlike some of the older immunosuppressives (cyclosporin).
yes
When you get older, your hair turns colors and you might get taller.
No it is not iron but vitamin A that makes it to grow.
Never as you grow older many end up with more hair.
Because you are growing older.
When you get older, your hair turns colors and you might get taller.
yes as the person gets older they grow a lot of grey or white hair
It will grow naturally, once you are old enough and reach puberty.
it grows back if you trim it a little once per month. Then your hair can grow faster and longer.
Yes if you EAT it and put it on your hair once a week.