I've been using it for almost 3 mths. I started using some other stuff right before starting so it's hard to say what's caused the changes I've noticed. I went through a shed several weeks after starting. I haven't got that hair back yet, but the hair I have certainly looks more healthy, thicker and darker. I've also noticed some small blond hairs on the temples lately, but maybe I didn't notice them before.
You should go to the official Hairmax LC forum. Just do a search on Yahoo and you will find it. You'll get all the technical info you want there. The only problem with that forum is that there is way too many positive threads there and hardly any negative ones. I tried to post a big long thread there once giving my honest 2 mth update and it didn't make it on the board. Guess I didn't brag on it enough.