Alpecin Gray Attack Shampoo naturally reduces first grey hairs, providing subtle, natural-looking results with each wash. It is suitable for all hair colors, especially effective for light brown to black hair. You can control the color intensity by adjusting the application time and frequency. The shampoo is designed to enhance both the color and thickness of your hair, giving you the hair you've been missing. It contains 5,6-DHI which slowly changes hair color to keep it looking natural, and the Alpecin Caffeine formula helps make hair look thicker.