Ingredient Encyclopedia

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Discover what’s inside your skincare — from retinol to aloe vera — with clear guides on benefits, uses, and safety.

Ingredient Encyclopedia

Polyglutamic Acid – Benefits, Side Effects & Uses

by ThankMeNow Editors on Sep 10, 2025
Polyglutamic Acid (PGA) is a high-performance biopolymer produced via fermentation that has revolutionized the "surface-glow" category of skincare. While Hyaluronic Acid is famous for pulling moisture into the skin, PGA is valued for its ability to form a breathable, hydration-preserving film that prevents water from escaping. With a molecular size typically larger than HA, it sits primarily at the surface to smooth micro-texture and provide an immediate "cushiony" bounce. Beyond simple hydration, PGA has been shown to inhibit the enzyme (hyaluronidase) that breaks down the skin's natural hyaluronic acid, effectively acting as a hydration stabilizer that makes your entire routine last longer.