I noticed my hairloss when I was 23 and acted on it 2 months before my 24th birthday - since taking propecia I can honestly say I regret It I experienced MASSIVE shedding for well over a year and there was no one and I mean NOONE that would help - I did get on treatments early listening to people on this board and that is all well and good advice I really have nothing against it but I suffered reflex hyperandrogenicity from taking propecia it wasn't some 'typical shed' from taking propecia (I also switched to dutasteride for a 3 month stint after a year on propecia) I lost so much hair I went to a THICK head of hair with slight recession to having to buzz my head down and cover up all the spots on top that are showing through now easily I am 25 and have nothing to show for acting on it early I have lost well over half of my coverage on top and have had several tests from dermatologists and so called hair 'specialists' and no help is available all they say is keep taking the drug! I have stopped the drug and voilà my extreme persistent hairloss stops I was losing it from the sides and even my eyebrows! I am in no way trying to persuade people to not act fast I am just saying that sometimes it is not as simple as oh quick start taking this pill - everything must be considered before taking the plunge towards taking propecia. I am still getting terrible scalp itch and losing hair now which is all part of my hormones trying to balance out from the dht and t conversion I guess, I am monitoring it with blood tests but I fear the damage has been done and I can never fix what I have lost.