Gamma Polyglutamic Acid

Gamma polyglutamic acid is a high-molecular-weight biopolymer produced by Bacillus fermentation of glutamic acid. It's used in serums and masks to attract and hold water on the skin surface, add slip, and support a supple feel.
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Ingredient Snapshot

Overview
A fermentation-derived polymer that locks in long-lasting hydration.
Category
Hydration, Barrier Support, Skin Conditioning, Sensitive Skin
Type
Humectant

Ingredient Ratings

Overall Rating

Great

Comedogenic Risk

None

Skin Benefits

Delivers long-lasting surface hydration for a plumper, smoother feel and helps reduce tightness. Can minimize the look of fine flakiness from dryness.

Uses In Skincare & Cosmetics

Featured in hydrating serums, sheet masks, and moisturizers to boost water retention and provide a silky application.

Comedogenic Rating

This ingredient is not typically evaluated for comedogenicity, and no standardized rating is available.

Safety

Generally very well tolerated with low irritation potential. Rarely, tackiness or pilling may occur at higher levels or when layered with certain products.

Is Gamma Polyglutamic Acid a Good Ingredient?

It rates Great because it's a stable, water-soluble humectant with supportive in-vivo hydration data and low irritation potential, and it genuinely improves moisture retention and skin feel. It also layers well with other actives across typical cosmetic pH ranges, which is the kind of consistent, well-supported performance that earns the top rating.

Products with Gamma Polyglutamic Acid

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