Ingredient guide
Polyglutamic Acid (PGA)
polyglutamic acid
In short
Polyglutamic Acid (PGA) (also known as pga) is a skincare humectant generally associated with hydration. It is often chosen for dry, combination and sensitive skin. MIRU describes it by what is visible on skin, never as a treatment or cure.
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What it is
A fermentation-derived humectant from the Korean hydration playbook, notable for forming a water-holding film on the surface. Often marketed against hyaluronic acid on hold-capacity claims that come from lab conditions, not faces. A pleasant surface hydrator with modest published human data.
Where it sits
A watery layer. After cleansing, before anything heavier, ideally on slightly damp skin.
- Cleanse
- Tone
- Polyglutamic Acid
- Moisturise
- SPF
Also found as
Related
Where to find it
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Search the Lens for polyglutamic acid (pga)Common questions
What does Polyglutamic Acid (PGA) do for skin?
Polyglutamic Acid (PGA) is generally associated with hydration. A fermentation-derived humectant from the Korean hydration playbook, notable for forming a water-holding film on the surface. Often marketed against hyaluronic acid on hold-capacity claims that come from lab conditions, not faces. A pleasant surface hydrator with modest published human data. MIRU frames ingredients by what is visible, not by medical claims.
When should I use Polyglutamic Acid (PGA)?
Polyglutamic Acid (PGA) is typically used morning or evening. Introduce any new active on its own first and add one product at a time so you can see how your skin responds.
Is Polyglutamic Acid (PGA) suitable for my skin type?
Polyglutamic Acid (PGA) is often chosen for dry, combination and sensitive skin. It is generally considered well tolerated. If your skin is reactive, patch-test first and watch for any irritation.
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Personal guidance, not medical advice.