This product's really harsh on my skin. It makes my skin all red and burn. For Exfoliating toner, this product is a very strong product. I would recommend other products that are more suitable for sensitive skin.

The Cosrx AHA liquid contains 7% of glycolic acid, this is why it's effective in treating and preventing whiteheads, but this also makes it not so beginner-friendly. Wondering how often you should use it for different skin types? Check out my video below:
https://www.youtube.com/watch?v=W1zqJtDFA7A