Question: what ingredients are best for acne?
Answer: RELATED: The Dermatologist's Guide to Healthy Skin and the Exposome [Ad]
Alpha-hydroxy acids (AHAs). ... 
Benzoyl peroxide. ... 
Clay. ... 
Salicylic acid. ... 
Sulfur. ... 
Tea-tree oil. ... 
RELATED: Best Drugstore Face Masks for Acne-Prone Skin.