AHA (Glycolic/Lactic) vs BHA (Salicylic): which Korean skincare ingredient?
AHA (Glycolic/Lactic) vs BHA (Salicylic): AHA (Glycolic/Lactic) leans toward dullness & glow, while BHA (Salicylic) targets acne & breakouts. Can you use both? With care — alternate nights or split AM/PM.
| AHA (Glycolic/Lactic) | BHA (Salicylic) | |
|---|---|---|
| What it is | Water-loving acids that resurface the top layer. Lactic is gentler; glycolic is stronger. SPF a must. | Salicylic acid dives into oily pores to decongest. Ideal for blackheads & breakouts. |
| Best for | Dullness & glow, Dark spots & tone, Pores & texture | Acne & breakouts, Pores & texture, Oil control |
| When to use | PM | PM |
Which should you choose?
Choose AHA (Glycolic/Lactic) if your priority is Dullness & glow; choose BHA (Salicylic) for Acne & breakouts. Many Korean routines use both — with care — alternate nights or split AM/PM.
AHA (Glycolic/Lactic) guide →BHA (Salicylic) guide →
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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.
What is BHA and what does it do?
BHA, usually salicylic acid, is an oil-soluble exfoliant that can penetrate pores to dissolve oil and dead skin, helping refine the look of texture and blemish-prone skin. In Korean routines it's used a few times weekly, with sunscreen by day, to avoid over-exfoliating.
✍️ Written & reviewed by the KoreaPlus Editorial team — dermatologist-informed, cosmetic-science researched & source-cited. Last reviewed 2026-06-21.
General educational information using cosmetic structure-function wording — not medical advice. Always patch-test new actives. © KoreaPlus.