My husband is reaching 40 and his hair has thinned out quite a bit over the years. So I bought this product to help him maintain the hair that he has left. Well, he's been using the product for a little over two weeks and it hasn't made too much of a difference. The product itself is pretty pricey, $35 at the salon so I was a little disappointed. I guess he will have to continue to use it to see some progress.