Hairloss can be either permanent or short term, if the loss occurs over around 4 seeks or less its often said there is a good chance most of it will come back. The longer it goes for over that the less chance.

Personally, I'm prone to hairloss but find that test in combination with finasteride (or dutasteride), Ketazol Shampoo, Spirolacatone, Minoxidil with topical Fiansteride (or dutasteride) prevents most if not all shedding, I also keep my cycles to around 6-7 weeks now. I do my injections every day or every other day to keep blood levels more stable/DHT peaks lower and I also sometimes use deca, eq, t-bol, slin, various peptides and occasionally tren (though for some people this causes severe hairloss). I favour short esters and like this I have not actually noticed any hairloss over my last 3 cycles, where as in the cycles b4 this I certainly lost a bit.