Hydration · $
Polyglutamic Acid Serum
The INKEY List
See reviewsA lightweight serum built around polyglutamic acid, a large amino-acid polymer that forms a moisture-binding film on the surface and is said to hold more water than hyaluronic acid.
- Best for
- All Types skin
- Price
- $
- Targets
- HydrationAging
- Key actives
- Glycerin, Polyglutamic Acid
Benefits
- Polyglutamic acid forms a smooth, water-locking film
- Boosts surface hydration and plumps fine lines
- Pairs well over hyaluronic acid to seal in moisture
Key ingredients explained
Glycerin
HumectantA small humectant that attracts and holds water in the stratum corneum, delivered into the epidermis partly via aquaporin-3. It raises hydration, improves plasticity and desquamation, and supports barrier recovery — one of the best-evidenced moisturizing agents.
In the guidePolyglutamic Acid
HumectantA microbial peptide biopolymer with abundant carboxyl groups that binds and holds large amounts of water, forming a smooth self-moisturizing film that lowers water loss. It can also upregulate hyaluronic-acid synthase and aquaporin-3, and reportedly holds more water than hyaluronic acid.
In the guideFull ingredient list
Highlighted ingredients are explained above.
How to use
- 01Apply to damp skin after water-based serums.
- 02Seal with moisturizer.
- 03Use morning and evening.
Warnings
- None expected.
Expert summary
Polyglutamic acid is a film-forming humectant that reduces water loss; layered over HA it acts like a hydration sealant, a smart, affordable plumping serum.
Reviews
Be the first to share your experience.
Loading reviews…
Related Products
Same category
Vitamin C
All TypesCeraVe Skin Renewing Vitamin C Serum
CeraVe
10% pure vitamin C serum for brightness, with ceramides.
Retinol
CombinationCeraVe Resurfacing Retinol Serum
CeraVe
Encapsulated retinol serum to smooth texture and post-acne marks.
Oil Control
OilyNiacinamide 10% + Zinc 1%
The Ordinary
High-strength niacinamide and zinc serum for blemishes and shine.