Treat scalp build-up with Neutrogena T/Sal Therapeutic Build-Up Control Scalp Shampoo. After just one use, this scalp treatment begins to clear crusty scalp build-up, while relieving itching and flaking associated with severe scalp conditions like psoriasis or seborrheic dermatitis. This therapeutic shampoo even helps control the symptoms of common dandruff, clearing and helping prevent flakes and scalp build-up. This dandruff control shampoo contains 3% salicylic acid, a clinically proven active ingredient, and continues to work for hours even after shampoo is rinsed off. Free of added color, preservatives and fragrance, the conditioning anti-dandruff and psoriasis scalp shampoo provides maximum relief for dry, itchy, flaky scalps and comes from Neutrogena, the number 1 dermatologist recommended brand.