He still has his hair, and he feels it more or less stopped further loss. He is 22 and I noticed it thinning about 4 yrs ago. He alone decided to take propecia about 2 yrs ago. He feels it is much controlled. I don't know if it has grown back hairs because he never had any bald spots, only thinner areas, so it's difficult to tell. Sorry I couldn't be more specific.