Beta Med Shampoo is a therapeutic shampoo containing 2% Pyrithione Zinc that is highly effective for controlling Seborrheic Dermatitis and Dandruff. Zinc inhibits the growth of Tinea (a fungous infection) on the scalp, and 2% is the maximum concentration allowed over-the-counter. Beta Med is formulated with a mild and gentle shampoo base that will not dry out or damage the hair or scalp, nor will it damage color-treated or permed hair. It contains no color or dyes that may leave residue or discolor the hair, even grey or light-colored hair. Beta Dermaceuticals is committed to providing the finest quality skin care products.