My FIL had horrible dandruff. My MIL bought every shampoo and treatment she could find for him to use. Nothing worked. One day a sample of Tone soap with coco butter came in the mail. My FIL used it to wash his hair while in the shower. After a few days his dandruff was almost gone, in a few weeks he was dandruff free. He used Tone soap ever since and never had a dandruff problem. You never know what will work.