This effective dandruff shampoo contains 3% salicylic acid, a clinically proven active ingredient and treats symptoms caused by scalp psoriasis, seborrheic dermatitis & dandruffThis therapeutic shampoo continues to work for hours even after shampoo is rinsed off with a conditioning formula free of added color, preservatives & fragranceDermatologist-recommended dandruff shampoo provides maximum relief for dry, itchy, flaky scalpsAfter just one use, this effective salicylic acid shampoo starts clearing crusty scalp build-up while relieving itching and flaking associated with severe scalp conditionsTreat scalp build-up with Neutrogena T/Sal Therapeutic Shampoo Scalp Build-Up Control.