Selsun Blue contains selenium sulphide and is specifically designed to fight dandruff and its associated itching and flaking from the first wash. Selsun Blue Deep Cleansing Anti-Dandruff shampoo contains a blend of cleansers and conditioners to leave your hair thoroughly clean. It also leaves hair looking healthy and feeling manageable. Selsun Blue is gentle enough for everyday use and should be used regularly for best results.