I ordered this shampoo based strictly off of reviews. I was in frantic search of something to help with my son's scalp psoriasis. I read more good things than bad, so I thought let's try it. So glad I did!! After one use, yes 1 use his scalp was free of flakes. No sweeping or shaking flakes off his shirt. The terrible itching he struggled with was gone. He walked around flake free for 2 weeks. The flakes that did eventually appear again but were much smaller with a slight itch. He figured it was time to wash his hair again with Vichy dry shampoo for itchy scalp. He is using it as a treatment shampoo as needed. He washes his hair every other day with a mild shampoo from Creme of Nature. I would highly reccomend this product to anyone who struggles with scalp irritations. My son (18) looks more confident & I couldn't be happier. Definitely worth every dollar spent.