propercia only blocks testosterone converting to dht.
I don't think he ran only test. Taking propercia while on dbol. nanadrol. Tren all other compounds won't help with hairloss. As taking deca n proscar even makes hairloss horrible since deca can't convert to the mild dhn it stays its normal form of nandrolone which is veryharsh on hair folicle. Than all other drugs he was taking would be eating the shit outta his hair to.
so it definitely wasn't that. Mote than likely once he stoped he got te telogen efflivum major hairloss and it seems to be more age related than anything can happen outta no where at any age.
and if not that he could of maybe been using topicals which don't just block dht but androgens on the scalp which makes it effective for all steroids that are high androgens. Like spirolactone. Azelaic acid. Zinc creams can all block dht and androgens completly topically.
so my guess is just age or stop his topical hair program. But if you look at his later pics he was losing hair in his last few yrs. Check it out. Was balding pretty bad his last comps.