Ingredient
Polyglutamic Acid (PGA)
Scientific name: Polyglutamic Acid · Humectant, film former
Polyglutamic acid is a humectant that holds several times more water than hyaluronic acid and sits mostly on the skin surface. Korean formulas use it to lock in moisture, smooth the look of fine lines, and give a plump, dewy finish, often layered with or over hyaluronic acid.
A fermented amino acid polymer that holds many times its weight in water and forms a thin breathable film on skin. Often paired with hyaluronic acid.
Good for
Best Korean products with Polyglutamic Acid (PGA)
No published products use this yet.
Good fit for
- • Dehydrated skin that wants a long-lasting plump finish
- • Anyone chasing the dewy, glass-skin look
- • All skin types, including oily
Worth skipping if
- • Very dry climates without a moisturiser sealed on top
Frequently asked questions
› What does polyglutamic acid do?
Polyglutamic acid binds a large amount of water to the skin surface, giving lasting hydration and a plumper, smoother look. It is a strong humectant that pairs well with other hydrators.
› Is polyglutamic acid better than hyaluronic acid?
It holds more water and stays more on the surface, while hyaluronic acid also reaches deeper layers. Many routines use both together for surface and deeper hydration.
› How do I use polyglutamic acid?
Apply to damp skin after lighter hydrators, then seal with a moisturiser. Like all humectants, it works best when there is water to draw on and a cream on top.
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