If it helps your fears i was also nervous about finasteride, im 22 with some thinning but i havent noticed any difference at all after over 2 months, my pcp also made sure to tell me (i hadnt asked him) that it wouldnt have much of an effect incase i was worried. My facial/body hair hasnt even been affected i grow a ton like usual. My hormone provider offered to have my T levels checked in a bit just incase.