K-Beauty Glossary
What is Serum?
세럼
Concentrated active treatment
Serums are concentrated formulations designed to deliver potent active ingredients deep into the skin. They typically have a lighter texture than moisturizers and a higher concentration of actives. In a K-beauty routine, serums are applied after essence and before moisturizer. They target specific concerns like wrinkles (retinol), dark spots (vitamin C), or acne (BHA).