How to Use CosRx's AHA 2 BHA 2 Blemish Treatment Serum The brand recommends using the serum at the end of your skin-care routine, but they also note that it can work as the first step — it's ...

COSRX has announced the release of their new The AHA 2 BHA 2 Blemish Treatment Serum that boasts 2% AHA & 2% BHA within 100% pure cotton compressed balls to provide a quick and effective solution ...