Sodium polyglutamate is the sodium salt of polyglutamic acid, a biopolymer that binds and retains water in the skin, enhancing hydration and the moisturizing performance of formulations. It also forms a light film on the skin surface that can improve smoothness and reduce transepidermal water loss.
| Reported effect | How often | Notes |
|---|---|---|
| Mild transient skin irritation or stinging | Rare | Generally well tolerated; occasional mild irritation reported, often linked to other formula components. |
| Contact allergy / allergic dermatitis | Very rare | Sensitization is uncommon but possible in predisposed individuals. |
| Redness or temporary tightness | Rare | Usually mild and self-limiting. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.