Our conditioner addresses itching, flaking, and scaling of the scalp using Zinc Pyrithione, the leading ingredient in the treatment of Dandruff. Zinc Pyrithione is an effective antibacterial and antifungal agent that fights the causes of Dandruff. Usage: Adults and children 2 years of age and older: After cleansing hair and scalp with Step 1 Total Relief Shampoo, apply to clean, wet hair. Massage into hair and scalp, concentrating on scalp and ends. Leave on for a few minutes. Rinse thoroughly. Use as needed to control dandruff.