Recommended for stubborn flaky conditions of the scalp as well as localized scaly areas of the body (elbows, knees), Kertyol P.S.O cream eliminates scales, regulates desquamation and soothes redness. Key Components Micronized Sulfur Salicylic Acid Kertyol Glycerin Indication Dandruff Face Body How to use Body: morning and evening, for 4 weeks. Leave on for 20 minutes. Rinse if needed. Scalp: apply in the evening, for 2 weeks. Leave on overnight. Apply Elution shampoo and rinse. Avoid contact with the eyes. Starting 18 years old.