Serum / Ampoule 세럼/앰플
Concentrated treatment for a specific concern. An “ampoule” is typically a more potent serum.
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Every term in this glossary is used the way Korean brands and Korean dermatology-adjacent marketing actually use it — which is often narrower than the English equivalent implies.
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What is the difference between essence, serum and ampoule?
Essence is the lightest and most hydration-focused, serum is more concentrated and targeted, and ampoule is the most concentrated of the three. The boundaries are marketing convention, not regulated definitions.
What is the difference between essence and serum?
In Korean skincare, essence is typically a thinner, hydration-focused layer that preps skin, while serum is more concentrated with targeted actives like vitamin C or niacinamide. Essence usually comes first; serum follows. The line between them blurs, and not every routine needs both.
What is an ampoule in K-beauty?
An ampoule is a highly concentrated Korean skincare treatment, stronger than a serum, used to target specific concerns like dullness, dryness or fine lines. Applied after essence and before moisturizer, it's typically used in short bursts or when skin needs an extra boost.
✍️ Written & reviewed by the KoreaPlus Editorial team — dermatologist-informed, cosmetic-science researched & source-cited. Last reviewed: 2026-08-10.
General educational information using cosmetic structure-function wording — not medical advice. Always patch-test new actives. © KoreaPlus.