✨ Dandruff? Not on your watch! ✨ Safe for color-treated and chemically processed hair. Contains Ketoconazole 1%, the only OTC dandruff fighter. Outperforms leading brands in lab tests. Targets and kills the fungus causing dandruff. Clinically proven to control flaking, scaling, and itching. Clinically Proven Ketoconazole 1% 4 Fl Oz Nizoral AD AntiDandruff Shampoo is a clinically proven solution designed to combat dandruff at its source. With its powerful Ketoconazole 1% formula, it effectively targets and eliminates the fungus responsible for flaking and itching, all while being gentle enough for color-treated hair. Use just twice a week for a clean, fresh scalp.