Lifestyle FLAKE FIX The 5 Best Shampoos for Dandruff, According to Dermatologists From stubborn flakes to persistent itchiness, these expert-backed shampoos help get dandruff under control. ADVERTISEMENTAhead, dermatologists explain what causes dandruff, how to tell it apart from a dry scalp, and the best shampoos to help keep symptoms under control. How to treat dandruffThe first line of treatment for dandruff is typically an over-the-counter dandruff shampoo. The best over-the-counter dandruff shampoosAmazon $ 8 Neutrogena T-Sal Shampoo Dr. Alicia Zalka, a board-certified dermatologist and founder of Surface Deep, recommends the Neutrogena T-Sal shampoo as a first-line treatment for dandruff. Shop Now Amazon Shop Now WalmartAmazon $ 12 Head & Shoulders Classic Clean Dandruff Shampoo You’ve probably heard of Head & Shoulders—it's one of the most popular over-the-counter dandruff shampoos—and for good reason.