I know I should ask my doctor this question, but... So I'm in my 40's; I have fine hair and have always had lots of it. No one but me would know that my hair is thinning, because it doesn't look like any of the pictures of women with thinning hair (yet). But I have a lot less hair than I used to. I started using ketoconazole shampoo a while ago (not for dandruff, but to see if it would help my thinning hair), but having read about it, it seems like if you're going to do anything, you should just use Rogaine. And they just came out with an easy to use, once daily foam. But is this overkill? I figure it is a topical, so the potential for side effects should be minimal, so I thought I'd give it a trial of 6 months to a year and see if it seems to do anything. Any opinions? Or just ask my doctor?