I used this product in 2003 from May to Nov. I've used/tried an assortment of speculative products over the years and the one has potential. there are two problems: cost and odor. The three month supply lasts a shade over two. The odor last for a few hours- you cant put it on twice a day. But I did see some improvement in overall density, but maybe not enough to continue.You really cant tell whats in it as the ingredients sound bogus.