Polyglutamic Acid
Sodium Polyglutamate
Also known as: PGA · Sodium Polyglutamate · Fermented Soy Acid
Moisturising
“A fermented humectant that holds 4x more moisture than hyaluronic acid.”
What it does
Polyglutamic acid (PGA) is a naturally occurring polymer derived from fermented soybeans. As a humectant, it holds significantly more water than hyaluronic acid by weight and also inhibits the enzyme hyaluronidase, which breaks down the skin's natural hyaluronic acid — effectively preserving the skin's own moisture reserves. It forms a breathable film on the skin surface that reduces transepidermal water loss.
Benefits
- Holds up to 4x more moisture than hyaluronic acid
- Inhibits breakdown of the skin's natural hyaluronic acid
- Forms a film that reduces water loss from the skin surface
- Suitable for all skin types including sensitive
- Improves skin plumpness and reduces fine lines over time
How to layer
☀️ Morning routine
Cleanser
Toner
Serum
Moisturiser
SPF
🌙 Evening routine
Cleanser
Toner
Serum
Moisturiser
Face Oil
As the last step in your routine
Good for
All skinDry skinNormal skinSensitive skinCombination skin
Works well with
Heads up
- ⚠May feel slightly tacky in high concentrations
- ⚠Less researched than hyaluronic acid with fewer long-term studies
How to use
Apply to damp skin after cleansing, before serum or moisturiser. Can be layered with hyaluronic acid for enhanced hydration. Use morning and evening.
Typical concentration: 0.1–2%