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Korean Exfoliators: A Guide to the Types

Exfoliation removes dead surface cells so skin looks smoother and more even — but it’s easy to overdo, and over-exfoliating is a common cause of irritation and a damaged barrier. Korean routines lean heavily on gentle chemical exfoliation rather than harsh scrubs: AHAs are water-soluble and work on the surface, BHA (salicylic acid) is oil-soluble and works inside pores, and PHAs (like gluconolactone) are the largest, gentlest molecules, often chosen for sensitive skin. Below are the main exfoliator types, with honest notes. Start a couple of times a week at most, wear sunscreen, and patch test — and stop if you see redness or stinging.

Honest ingredient notes No fake ratings Patch test first

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Product types to know

These are general ingredient and product types, not endorsements of any single brand. Always read the current label and patch test before regular use.

Frequently asked questions

What’s the difference between AHA, BHA and PHA?
AHAs (like glycolic and lactic acid) are water-soluble and work on the skin’s surface to smooth texture and brighten dullness. BHA (salicylic acid) is oil-soluble and gets inside pores, so it suits oily, congested skin. PHAs (like gluconolactone) are the largest, gentlest molecules, working on the very surface and adding hydration — often the pick for sensitive skin.
How often should I exfoliate?
Less than people think. Many start a couple of times a week and adjust to their skin, since over-exfoliating can irritate skin and damage the barrier. Follow each product’s directions, build up slowly, and cut back at any sign of redness, stinging or tightness.
Which exfoliant is best for sensitive skin?
PHAs (such as gluconolactone or lactobionic acid) are often described as the gentlest chemical exfoliants and are a common choice for sensitive skin. Enzyme exfoliants and low-strength formulas are also milder options. Patch test first regardless, as any acid can be a trigger for some people.
Do I need sunscreen if I exfoliate?
Yes, very much. Exfoliating acids can make skin more sensitive to the sun, so daily sunscreen is important both to protect freshly exfoliated skin and to avoid undoing the even-tone benefits you’re after. Apply and reapply as directed.
Can I over-exfoliate, and how would I know?
Yes — over-exfoliating is common. Signs include redness, stinging, tightness, flaking, increased sensitivity or breakouts. If you see these, stop exfoliating, focus on gentle hydration and barrier support, and give skin time to recover. Persistent irritation is worth a dermatologist’s advice.

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This page is general information about skincare ingredient types, not medical advice. Everyone’s skin is different — patch test new products and consult a dermatologist before starting anything if you have a skin condition, allergies, or are pregnant.

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