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Korean PHA Products for Sensitive Skin

PHAs (polyhydroxy acids) such as gluconolactone and lactobionic acid are the gentlest family of chemical exfoliants, and people with sensitive or easily-irritated skin often consider them when stronger AHAs and BHAs feel too harsh. They are everyday cosmetic products for smoothing the look and feel of skin, not a treatment for any skin condition, and even gentle acids can irritate some people. The sensible approach is to start with a low strength, use it a couple of nights a week, and build up slowly. Below are the Korean PHA product types people reach for, with honest notes. Patch test, introduce one at a time, and wear sunscreen by day.

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.

PHA routineA simple routine: cleanse, apply a gentle PHA step, add hydration, and use sunscreen during the day.1Cleanse2PHA toner3Hydrate4Sunscreen (AM)
Exfoliant gentleness sketchSchematic bars sketching how gentle each acid family tends to feel — not a measure of effectiveness or strength.Gentleness sketch only — not effectiveness dataPHA (gentlest)AHA, e.g. glycolicBHA, e.g. salicylic

Frequently asked questions

What is a PHA and how is it different from AHA or BHA?
PHAs (polyhydroxy acids) such as gluconolactone and lactobionic acid are a family of chemical exfoliants with larger molecules than AHAs like glycolic acid. People often describe them as the gentlest type, which is why sensitive skin tends to start here. They are cosmetic exfoliants, not a treatment for any condition.
Are PHAs good for sensitive skin?
Many people with reactive skin find PHAs gentler than stronger AHAs or BHAs, but “gentle” is not the same as “irritation-proof.” Any acid can irritate some people, so start with a low strength, use it occasionally at first, and patch test before regular use.
How often should I use a PHA product?
A common approach is a couple of nights a week to start, then building up slowly if skin stays comfortable. There is no fixed rule — over-exfoliating can damage the skin barrier and make things worse, so go low and slow and stop if you see irritation.
Do I need sunscreen when using PHAs?
Yes. Exfoliating acids can leave skin more sensitive to the sun, so daily sunscreen is important when using any exfoliant. Many people exfoliate at night and focus on sun protection during the day.
Can I use a PHA with retinol or vitamin C?
Some people layer or alternate actives, but stacking several at once can irritate skin. A cautious approach is to introduce one active at a time, space them out (for example on different nights), patch test, and see a dermatologist if you are unsure what your skin can handle.

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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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