Remove dandruff with System Professional Purify Lotion, an effective and targeted leave-on treatment that fights dandruff formation for up to 24 hours. The leave-on formula enables the complex to work optimally on the scalp, to soothe and reduce the presence of Malassezia globosa microorganisms. For the best results in fighting dandruff use System Professional Purify Lotion in combination with System Professional Purify Shampoo.