Im not sure where i read it but if u research u might find it... i read about a study somewhere in the past that showed how Finasteride during the cycle would reduce the muscle gains very slightly so compared to the benefits from it (not going bald), the gains are really good... if im not mistaken it was like 2 groups with same steroids intake and 1 had finasteride and the other didnt, the muscle difference was like really low, maybe 5-10% difference?? or w/e i cant be sure about the results cuz it was quite a while ago
But this will only help you vs testosterone and some other steroids...
Stay away from Oximetolone, Dianabol, Stanozolol, Trembolone ... any of these 4, if u have ANY genetics for hair loss it will crush ur hair... i had done 2 cycles with test and NO hair loss at all at 500 mg/week... when i added stanozolol for 4 weeks only on the second cycle i lost 30-50% of my entire hair and maybe 1/2 - 1 inch hairline reeceded... none noticed cu zi had so much fucking hair but im never touching it again... be careful dude search a lot before u do anything that u may regret