Head & Shoulders Classic Clean Dandruff Shampoo fights dandruff with a unique Hydrazinc anti-dandruff formula that moisturizes dry scalp, calms itchy scalp, and keeps hair looking great. Why choose Head & Shoulders? If you're still seeing flakes with your current product, try the dandruff treatment dermatologists recommend most: Head & Shoulders. The clinically-proven formula fights flakes better than typical anti-dandruff shampoos, Head and Shoulders has been proven effective in over 200 clinical tests, making it the most tested and most trusted dandruff shampoo in the world. A great dandruff shampoo should do more than fight flakes. Because healthy hair is important, Head & Shoulders infuses every shampoo with essential beauty shampoo elements, like rich moisturizers and fantastic fragrances. Their products are always tough on dandruff, but gentle on hair. That's why Head & Shoulders is the #1 selling dandruff shampoo in the world.