Head & Shoulders Clinical Strength Dry Scalp Rescue Shampoo, brought to you by the #1 Dermatologist Recommended Brand, delivers our Maximum Dandruff Protection. Powered by 1% selenium sulfide, this unique formula starts working 2X faster to fight the main cause of dandruff.* Head & Shoulders Clinical Strength Dry Scalp Rescue Shampoo is Clinically proven to relieve stubborn dandruff and dryness. Still gentle on scalp, you can use this formula every wash, and break the cycle of stubborn dandruff.** Now formulated with a new, great scent for enjoying every wash.*kills more Malassezia at 3 washes vs. 6 washes with ordinary anti-dandruff shampoo**visible flakes, with regular use.