I don't think age really matters, the whole point is HOW IMPORTANT your hair are to you.
In fact, it is when you are young that you really don't want to thin, because you need to look attractive to find girlfriends... get married etc..Once you reach a certain age your wife will most likely not leave you if you become bald so you could just drop all the meds at that point...or EVEN BETTER..at that point some new treatements could be avaialable..
This flutamide is a seriousely powerful anti-androgen and it works very well, and so is dutasteride, and finasteride to a lesser degree.
In a few weeks/months I am sure more and more positive posts will appear on Flutagel here and there, from people that have used it.
This stuff is not harder to get than dutasteride, just order it form SINERE site and 2 or 3 weeks max. later you can begin using it.
Even castrated men ( zero DHT) did not regrow lost hair, so set your expectations accordingly when it comes to re-growth.
The earlier you start, the better chances you have to keep what you have.
Good luck
El Duternio