AHA (Glycolic/Lactic) vs Mandelic Acid: which Korean skincare ingredient?
AHA (Glycolic/Lactic) vs Mandelic Acid: AHA (Glycolic/Lactic) leans toward dullness & glow, while Mandelic Acid targets rough & uneven texture. Can you use both? With care — alternate nights or split AM/PM.
| AHA (Glycolic/Lactic) | Mandelic Acid | |
|---|---|---|
| What it is | Water-loving acids that resurface the top layer. Lactic is gentler; glycolic is stronger. SPF a must. | Derived from bitter almonds and prized precisely because it is slow. The bigger the acid molecule, the less briskly it penetrates — which is exactly what reactive skin wants from an exfoliant. |
| Best for | Dullness & glow, Dark spots & tone, Pores & texture | Rough & uneven texture, Acne & breakouts, Dark spots & tone, Reactive & easily-stung skin |
| When to use | PM | PM |
Which should you choose?
Choose AHA (Glycolic/Lactic) if your priority is Dullness & glow; choose Mandelic Acid for Rough & uneven texture. Many Korean routines use both — with care — alternate nights or split AM/PM.
AHA (Glycolic/Lactic) guide →Mandelic Acid guide →
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🙋 People also ask
What is hyaluronic acid and how do you use it?
Hyaluronic acid is a humectant that draws water into the skin for a plumper, hydrated look. In Korean routines it's best applied to damp skin and sealed with a moisturizer on top, so the moisture it attracts stays locked in rather than evaporating.
What is the difference between AHA and BHA?
AHAs like glycolic and lactic acid are water-soluble and work on the skin's surface to brighten and smooth, while BHA like salicylic acid is oil-soluble and gets into pores. In Korean skincare both are used sparingly, a few times weekly, always with daily sun protection.
✍️ Written & reviewed by the KoreaPlus Editorial team — dermatologist-informed, cosmetic-science researched & source-cited. Last reviewed: 2026-08-23.
General educational information using cosmetic structure-function wording — not medical advice. Always patch-test new actives. © KoreaPlus.