DHT binds to receptors that are predominately located in the hair folical( and to some extent the prostate) and certain supps ( Beta Sitosterol)mimic finasteride by preventing the conversion of test to DHT AND by preventing the DHT from binding to various receptors without the sides of finasteride ( some studies have shown that finasteride cause 80% MORE prostate cancer). A study done at the Norris Cancer Center at the University of Southern California ( British Journal of Cancer, vol.78 in 1998) found that men who took finasteride lowered their PSA by 48% BUT had 800% MORE cancer tumors in only one year than men taking a placebo!!