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Polyglutamic Acid (PGA) in summer: how to adjust

⏱ 1 min read
⚡ Quick answer: Using Polyglutamic Acid (PGA) in summer: the season brings heat, humidity, sweat and peak UV, 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 summer: the season brings heat, humidity, sweat and peak UV, 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 summer does to your skin

Heat, humidity, sweat and excess oil call for lightweight, fast-absorbing layers and a high, re-applied sunscreen.

How that changes Polyglutamic Acid (PGA)

Summer rewards lighter textures and punishes anything occlusive. Strength of active matters less than whether it survives a humid day. 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 summer 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.