The complete formula is formulated with purifying complementary actives and acts on all the factors involved in severe dandruff cases. Chloe DS Shampoo prevents recurrence. 1 application per week because maintenance can prevent dandruff from reappearing for a long time. Apply the foam and massage into the scalp rinse. Reapply and leave 3 minutes rinse Intensive treatment 3 times a week 2 weeks