AT 21, am I too young to get a hair transplant?

Yes, 21 is too young for a hair transplant because you will not know what is your eventual balding pattern at 21. If, for example, you transplant a receding hairline at 21, and then should develop significant balding by the time you are 26, you will have hair where the transplant was done and nothing behind it (looking weird). IF for example, you have crown balding at 21, and transplant the bald area in the crown, by the time you are 26, you might have an island of hair surrounded by a ‘bald sea’ and then you would really look weird and everyone would know what you did. Everyone needs a Master Plan for balding created by you with a good doctor who thinks ahead to anticipate what you and he might do as it reflects the progressive nature of your balding that is the consequence of ‘genetic male patterned balding’. I have seen too many freaky looking transplanted men who never created such a Master Plan with their doctors. I have written about this here: https://newhair.com/assessing-hair-loss/