Hair Loss Products

I have very fine hair and I often see women as they get older start to lose their hair or their hair thins out really bad. I am hoping I don't end up that way the older I get. If so, I would have to look into hair loss products to see if I could grow in new hair and thicken it up. This would be great for men too, who are beginning to go bald or just thinning out really bad.