Polyglutamic Acid

Polyglutamic Acid is a humectant used in K-beauty for Holds moisture, Plumps, Strengthens barrier. The "holds 5,000× its weight in water" flex. Works like hyaluronic acid's richer cousin — sits on top of skin and locks moisture in.

Polyglutamic Acid is particularly well-suited to dry, mature, normal, combination, sensitive skin.

Polyglutamic Acid layers well with hyaluronic acid, niacinamide, peptides. These combinations are common in K-beauty routines and have no known negative interactions.

We rate the clinical evidence for Polyglutamic Acid at 3/5 — moderate. 0.1–2% in serums. Layer under a sealing moisturizer for full effect.