I've been using it for awhile now and I think I can safely say it works. When I blow dry my hair it feels and looks much thicker and fuller. I have always had fairly thick hair...so when it thinned out a bit I got panicked. I believe my sudden thinning was due to anemia which I get every now and then. When it happens I pop some vitamins or eat more green vegetables. I started taking the Nioxin pills and that helped too I think with the whole vitamin issue. I know my diet is lacking in that area. My hair is not shedding like before. It is looking fuller and healthy again. I am hoping it all grows back just the way it was before, but we'll see. I'll post more on that later!