Controls the symptoms of dandruff, seborrheic dermatitis and psoriasis. Recommended by dermatologists and clinically proven to control the scalp itching and flaking caused by scalp psoriasis, seborrheic dermatitis, and even common dandruff. Proven effectiveness of 2% coal tar. Effective from the first use. Keeps working long after the shampoo is rinsed off. Gentle enough for everyday use. Alcohol-free.