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Polyglutamic Acid (PGA) in autumn: how to adjust

⏱ 1 min read
⚡ Quick answer: Using Polyglutamic Acid (PGA) in autumn: the season brings falling humidity and barrier recovery, so what changes is texture, frequency and what you layer around it — not usually whether you use it at all.

Using Polyglutamic Acid (PGA) in autumn: the season brings falling humidity and barrier recovery, so what changes is texture, frequency and what you layer around it — not usually whether you use it at all.

A fermentation-derived humectant that originates in natto, the Japanese fermented soybean. It is bigger than hyaluronic acid, so it behaves more like a moisture-holding film than a deep hydrator — which is why the two are often stacked.

What autumn does to your skin

Dropping humidity is the classic time to repair the moisture barrier and slowly transition to richer textures.

How that changes Polyglutamic Acid (PGA)

Autumn is the classic Korean repair season — humidity drops, summer sun damage surfaces, and richer textures start to feel right again. Polyglutamic Acid (PGA) works on dehydration (water-poor skin), dryness & dehydration, rough & uneven texture, and it is normally applied BOTH.

What to layer it with

💧 Hyaluronic Acid💧 Glycerin🌾 Beta-Glucan🧱 Ceramides

🍂 Full autumn guide →🫧 Polyglutamic Acid (PGA) guide →

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🫧 Polyglutamic Acid (PGA)

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✍️ 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.