3 IN 1 ACNE CLEANSER. Benefits: Helps to treat acne and prevent future blemishes. Non-drying formula. 99% Biodegradable formula. Can be used as cleanser, mask, or spot treatment for face. Suitable for all skin types, including sensitive and acne-prone skin types. Paraben-free. Key Ingredients: Salicyclic Acid. Charcoal. Centella. Research Results: Kiehl's acne cleansing paste is clinically proven to help reduce acne:. In 3 Days, Reduces 4 Types of Acne*. -49% Acne Count in 1 Week**. *Based on an expert grading of papule, pustule, whitehead and blackhead count.. **Based on an expert grading of inflammatory (papule & pustule) acne count.. 100% saw clearer skin in 1 week***. ***Results based on expert grading on one or of inflammatory and non inflammatory count at 4 weeks..