trannies use drugs like fina and duta to inhibit DHT, there is a reason for that.. they want to limit male characteristics by abusing anti-androgens.
DHT is not the enemy. it is our sex hormone and an important androgen hormone for males.
I understand guys do not want to lose their hair.. so for those run nandrolones, which convert to DHN, and not DHT. however without stacking in an androgen with that, expect a drop in libido. so you are damned if you do and damned if you don't... so as musky suggested, if hair is that important to you then use SARM's instead. they do not bother the hair