Polyglutamic Acid (PGA) in Skincare: Formulating a Next-Gen Humectant for Long-Lasting Hydration

Polyglutamic acid (PGA) is a next-generation humectant derived from fermented soybeans that can hold several times more water than hyaluronic acid and forms a breathable film to lock it in. Used at low concentrations (often 0.1–1%), it delivers long-lasting hydration and a smoother feel — an upgrade or complement to hyaluronic acid.

The Scenario: Hydration that lasts

PGA formulation faces three challenges:

Pain Points

• Hydration must be both drawn in and locked in to last through the day;
• A humectant alone can feel sticky or evaporate without a film to seal it;
• The dose must be tuned so the texture stays elegant, not tacky.

The Solution: Three PGA formulation solutions

Three practices build lasting hydration:

1. High water-binding capacity PGA binds several times its weight in water, drawing in long-lasting hydration.

2. Breathable film-forming PGA forms a breathable film that seals moisture in without clogging.

3. Low, elegant dosing Used at 0.1–1%, PGA hydrates deeply while keeping the texture smooth, not tacky.

The Result: Hydration that holds

With PGA, skin stays hydrated longer and feels smoother. Brands offer a next-gen humectant that outperforms or complements hyaluronic acid.