Dandruff. It's not exactly people's favorite topic, and it's not always easy to deal with, either. That's why Keune developed Purifying Shampoo, with zinc pyrithione, to fight the fungus that causes dandruff. As Keune tackles those nasty flakes, 1922 By J.m. Keune is also looking after hair's health. Creatine helps hair stay strong by decreasing breakage. So you can casually run your fingers through your healthy head of hair while wearing that stylish black cashmere sweater.