With many years of seborrheic dermatitis, I tried dozens of shampoos more expensive pharmacy as each other. But each time, after 2 days, the itching and dandruff resumed returned fatally. So I tried it without much conviction shampoo and there, great! More even itching shampoos with only 2 weeks! There might be a few films when we shake the hair, but really, all visible and embarrassing dandruff disappeared. I recommend most strongly that although everyone reacts differently depending on the product!