Dandruff has been a lifelong problem for me. Even dermatologist PRESCRIPTION shampoo did nothing to improve the condition of my scalp. Years later, I finally bought the Biolage Anti-Dandruff shampoo and conditioner, and I haven't had a problem with dandruff since. In addition, I also alternate different shampoo and conditioners, as well as using a comb in the shower to prevent product build up. This product is a life saver!