Korean Serum Types Explained: Ampoule vs Serum vs Essence vs Booster — What's the Difference? (2026)
By Victoria | K-Beauty Basics · Education Ask ten Korean skincare enthusiasts to explain the difference between an ampoule, a serum, an essence, and a booster — and you'll get ten different answers. These four terms are used interchangeably in product marketing, inconsistently across brands, and differently in Korean versus global English descriptions of the same products. This guide cuts through the confusion. There are genuine functional differences between these product types — they serve different purposes in a routine, they're applied at different steps, and choosing the right one for your concern makes a measurable difference to your results. π In This Guide The Quick Comparison μμΌμ€ — Essence μ°ν — Ampoule μΈλΌ — Serum λΆμ€ν° — Booster The Correct Layering Order FAQ The Quick Comparison Type Concentration Texture Routine Position π μμΌμ€ (Essence) Low-medium Watery-thin ...