3.0% Salicylic Acid. Extra protection. Controls: Tough dandruff; Persistent flaking; Stubborn itching. Denorex Extra Strength 2-in-1 Dandruff Protection fights tough dandruff and helps keep it from coming back. Contains 3% salicylic acid to control tough dandruff, persistent flaking and stubborn itching. Vitamin-enriched for healthy, good-looking hair. Built-in conditioners provide the body and shine you"d expect from a separate conditioner.