Just to calrify P4D, /body + facial/ hair grows faster and posiblly thicker, the hair on your scalp can be lost, more likelly if your family has a history of male pattern baldness ( I think its best to look at the maternal side of the famiily.
DHT is the cause in both cases, it just thins the hair on your scalp, and increases body / facial hair growth. odd, but true!
finestride or other compounds can reduce this, do a search on hair loss.