I am gonna be 20 in a month my uncle lost his hair early 20s my grandfather lost it in his 30s or 40s my father has a Norwood 2.5 at 47, my mother side all have hair. I have fine dark hair, I also took testosterone boosters for a month and was on creatine supplements for a year which turns testosterone to dht when I noticed my right temple thin and go back a little.