Previous page Next page 1 The Benefits 2 Results 3 Key Ingredients 4 How to use 5 Green Packaging Hyper Acid AHA BHA PHA LAH 30 Serum New concept AHA, BHA, PHA and LHA 30% rinse-off serum 1 minute rinse-off serum with an unique charcoal color and medium-high viscosity. How to use: After cleansing, apply 2-3 drops on the skin, avoiding the eye and lip areas. Manage the product into the skin for about 1 minute, and rinse thoroughly with lukewarm water. The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. How often should I use it? This is a high-concentrated exfoliant serum that contains four types of acids that help reduce dead skin cells and excessive sebum production. Recommended to use the product 1 to 2 times a week. Why does my skin sting and turn red when I use it? It is recommended to do a patch test before use. This is a chemical exfoliant containing a high concentration of AHA, BHA, PHA and LHA, thus you may feel a tingling sensation during the application of the product. Can I use this product during the day? It is recommended to use the product at night when there is no direct sunlight. However, if you use it during the day, please apply and reapply sunscreen throughout the day to protect your skin. Can I just wipe the product off? It is recommended to rinse your face with water after use. Can I leave the product for more than 1 minute? Due to the high-concentration acids, if you leave the product on the skin for too long, it may cause irritaion. It is recommended to remove the product from the skin one minute after application.