The hair on my head has been thinning for several years, and just recently I started taking Propecia, B-Complex vitamins, biotin, and MSM to hopefully turn it around. I don't really know how to say this, but just before starting propecia I noticed that my pubic hair was also thinner than it was when I was a teenager, and my facial hair seems to be thinner as well? I'm pretty sure I have male pattern baldness, but could these be signs of another problem, such as a vitamin deficiency or thyroid problem? I also have seborrheic dermatitis of the scalp but nowhere else. I stopped taking multivitamins and fish liver oils recently because I read that Vitamin A overdose can lead to hair problems. Any insight would be appreciated, I am really confused and I want to know what I should do.