I noticed that my natural hair (let's call it sparkle - you know the kind that shows up after 50?) was always brighter after my hairdresser shampooed my hair before cutting it. The silver was less yellow and the gray was lighter. I found out that they use this product on all of their clients because, unlike me, most of their clients color their hair. I could not believe that a product intended for colored hair makes my natural hair looked so good. Now I buy this product all the time and get so many complements on how lovely my hair looks.