What it does
May improve perceived hydration and the appearance of dehydration lines.
Humectants
Polyglutamic acid.
A polymer used to retain water and create a smoothing cosmetic film on the surface.
- INCI name
- Sodium Polyglutamate
- Function
- A humectant and film-forming ingredient.
- Information level
- Emerging evidence
- Last reviewed
- 22 September 2026
Who may benefit
All skin types, particularly dehydrated skin.
Compatibility
Hyaluronic acid, glycerin and ceramides.
Precautions
Numerical claims about water-retention capacity cannot automatically be transferred from a raw material to the finished product.
How to use it
Morning and evening.
Concentrations
The percentage cannot be inferred from INCI order. WAI LAB shows it only when stated by a verifiable source.
HOW TO READ IT
What it means in the INCI list?
In the European Union, ingredients above 1% are listed in descending order by weight; below 1%, they may appear in any order. Their position therefore cannot be used to calculate an exact percentage.
Its position helps you understand the formula, but does not on its own establish effectiveness or an exact percentage.
SOURCES
Where the information comes from.
WAI LAB distinguishes cosmetic function, regulatory context and scientific literature. This information is not a substitute for medical advice.
FROM UNDERSTANDING TO CHOOSING
Products with Polyglutamic acid.
38 catalogue products list a recognised form of this ingredient in their INCI.
38 resultsVerified profiles with declared concentrations appear first.
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VerifiedWAI 86/100 · partialSephora CollectionCLEAR & PURIFY - Fluido idratante 8 ore acido poliglutammico e prebiotici
VerifiedWAI 89/100 · partialSephora CollectionCLEAR & PURIFY - Lozione bifasica equilibrante acido poliglutammico e prebiotici
VerifiedWAI 93/100 · partialSephora CollectionGLOW - Crema In Gel Illuminante Con Vitamina C e Acido Poliglutammico - 50 ml
VerifiedWAI 93/100 · partialSephora CollectionGLOW - Crema In Gel Illuminante Con Vitamina C e Acido Poliglutammico - Ricarica
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VerifiedWAI 85/100 · partialSephora CollectionHYDRATE - Gel-in-acqua rigenerante con acido ialuronico e poliglutammico - 50 ml
24 of 38 shown