Neutrogena T/Sal Therapeutic Scalp Build-Up Control ShampooOur therapeutic scalp shampoo is a dermatologist recommended formula designed to clear crusty scalp build up while relieving itching and flaking associated with severe scalp conditions, like dandruff and psoriasis. This effective formula contains 3% Salicylic Acid, a clinically proven, active ingredient that can be used as the first step in any scalp routine. Its clear formula is free of added color, preservatives and fragrance. How to use For best