Misc: Pyrithione Zinc. 3 Action formula. America's No. 1 dandruff shampoo (based on volume sales). Up to 100% flake free (visible flakes;regular use) guaranteed (Satisfaction Guarantee: If you are not satisfied return this product with a proof of purchase for a refund via prepaid card. Call 1-800-843-3543). 1) Cleans - to remove oil and flakes. 2) Protects - scalp from dandruff. 3) Moisturizes - each hair strand from scap to tip. No. 1 dermatologist recommended. www.headandshoulders.com. Made in USA of US and/or imported ingredients.