My hairdresser suggested I try this shampoo when she noticed my hair had little natural shine. I am in my early 40's and I believe hormonal changes (hello, perimenopause!)are starting to effect my skin and hair. In short, it is hard to believe how much difference these products made in the texture of my hair in just one use! My hair felt silky and shiny, and I needed little additional product to make my hair sleek and non-frizzy while drying. I am skeptical about spending a lot money on cosmetics, but I have always used salon shampoos to preserve my color, and this is unlike any other shampoo/conditioner I have used. I would never have thought something you wash down the drain could make such a difference!