Polyglutamic Acid

Polyglutamic Acid (γ-PGA) is a naturally occurring biopolymer produced through bacterial fermentation of Bacillus subtilis, traditionally found in Japanese natto (fermented soybeans). This water-soluble anionic polypeptide is renowned for its exceptional moisture-binding capacity—reportedly holding up to 5000 times its weight in water, surpassing hyaluronic acid—while forming a breathable protective film on skin. Formulators favor it for its ability to enhance skin hydration without tackiness, improve the delivery of other actives, and provide a smooth, silky after-feel in serums and moisturizers.