My hair has been thinning on the top and in the front of my bangs for about 6 months - at least that I actually started noticing.
I didn't go to the dermatologist at first, but as I started freaking more and more out, I read online at drugstore.com under their GNC Site, the responses to women who took the GNC Hair, Skin and Nails formula vitamins. They all talked about how it worked so well at regrowing their hair back from thinning! (Go on the site and see for yourself!). So, I've been taking 2 tablets a day for about 2 1/2 months now, and I do have significant hair growth in the front, by my bangs!! I'm very excited, even though it does seem to take longer to grow back then my regular hair growth. OH - I did combine this vitamin with a product called "Nioxin Follicle Booster". It's for excessively thinning hair, and although it calls for applying it 2x a day, I only apply once a day before bed because it makes my hair around the thinning areas too sticky to style for the day. It's about $50 a bottle, so I get it on E-Bay for about $35.
I did, however, eventually go to the dermotologist 1 month ago and had bloodwork done to check for thyroid problems, alopecia, iron deficiency, etc. I did get a call from my doctor a couple weeks ago telling me my iron was very low (13), and to get a simple One-A-Day tablet with iron and take one a day, and not try Rogaine yet so we can see if just the iron helps regrow the hair. (I'm finding it very hard to wait, even though I do have some regrowth going on, because I am very upset and having severe anxiety over this whole hairloss situation.) I saw in this forum that other women with low iron are taking 400 mg. a day, and I'm only taking 27 mg. a day. Maybe it's because I'm 47 and going through menopausal symptoms.
I'm going to keep watching this forum as it makes me feel as though I'm not the only woman going through this. Good luck to all and thank you for all your helpful hints.