My son has had trouble with severe dandruff. He also had psorosis in his scalp when he was younger, at that time the doctor prescribed T-Gel shampoo. With the new dandruff problem, I couldn't afford the T-Gel, so I bought the Dollar General brand of Head & Shoulders. Believe it or not it worked. Within just a couple of weeks, his dandruff problem was gone and it was pretty bad.