Prescription strength flake protection (1)#1 Dermatologist recommended dandruff brand (2)Selenium Sulfide dandruff and seborrheic dermatitis shampooExtra strength dandruff shampoo provides effective relief for the toughest dandruff, with 1% selenium sulfide#1 Dermatologist recommended dandruff brand (based on a 2013 survey of U.S. dermatologists)