"Dandrene contains zinc pyrithione, and active ingredient that has multiple properties. It kills Malassezia, the yeast that causes dandruff, but also reduce inflammation and sebum production, which is crucial as Malassezia feeds on sebum. Dandrene should be used daily or at a minimum three times a week, in alternation with another shampoo, depending on dandruff severity. But what makes Dandrene unique is that it leaves the hair soft and shiny as it contains ingredients that moisturize the hair shaft."