Ingredient
Polyglutamic Acid
PGA
Gamma-PGA
Poly-gamma-glutamic acid
What it is
A natural polymer of glutamic acid, known for its exceptional water-binding capacity for deep hydration.
How it works
Its long polypeptide chain binds up to 4,000 times its weight in water, forming a moisture-retaining film on the skin that hydrates more effectively than hyaluronic acid.
What it does
Humectant
Skin conditioning
Concerns to know
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Barrier & hydration support
A well-studied humectant or emollient that helps hydrate the skin and support its moisture barrier.
Found in these products
Anua
Niacinamide 10% + TXA 4% Serum
Worth knowing
Anua
Peach 70 Niacin Serum
Worth knowing
SKIN1004
Probio-Cica Enrich Cream
Worth knowing
SKIN1004
Madagascar Centella Hyalu-Cica Brightening Toner
Worth knowing
SKIN1004
Madagascar Centella Hyalu-Cica Sleeping Pack
Generally well tolerated
SKIN1004
Probio-Cica Intensive Ampoule
Worth knowing
SKIN1004
Madagascar Centella Hyalu-Cica Blue Serum
Generally well tolerated