After cleansing and toning, put an adequate amount onto fingertips or cotton pad and swipe a thin layer of the liquid over the skin, avoiding the eye and mouth area. For use during the daytime, follow with a broad-spectrum sunscreen rated SPF 30 or greater. Begin with using the product once a week, and after the skin has adapted to it, increase the usage up to 2 to 3 times a week. 

*Do NOT mix with high concentration of AHA, BHA, retinol, or vitamin C products

Cosrx AHA 7 Whitehead Power Liquid