Best Korean serum for dryness & dehydration
How to choose a Korean serum for dryness & dehydration.
Your targeted treatment — a concentrated dose of one or two actives for a specific concern (brightening, calming, firming).
Ingredients to look for
All about Korean serum → · All dryness & dehydration picks →
Explore more K-beauty guides →🙋 People also ask
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 속건조 (inner dryness)?
속건조 describes skin that looks and feels oily on the surface while being tight and dehydrated underneath. It is why oily skin still needs hydration, and why stripping it makes things worse.
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.
✍️ Written & reviewed by the KoreaPlus Editorial team — dermatologist-informed, cosmetic-science researched & source-cited. Last reviewed: 2026-08-08.
General educational information using cosmetic structure-function wording — not medical advice. Always patch-test new actives. © KoreaPlus.