I think Nioxin is a very good hair promotion product that works quite well. It helped me - and a few close friends I know, both ladies and gentlemen. Also taking fish oil caplets or the oil itself (its usually lemon flavored) helps a lot too. As mentioned, using a natural shampoo that has no lurel sulfates helps keep hair healthier & thicker IMO and as I've read online by many other folks.
Good luck. Isn't genetics fun
lol.
Be glad you have your health, at least. And as they say, worrying about hair loss generally makes you have hair loss. On the up side, many men look mighty sexy with shaved heads.