Hyaluronic Acid is the queen of hydration. But there’s a new molecule in town trying to steal the crown.
Polyglutamic Acid (PGA) is a peptide that can hold four times its weight in water. HA can hold one thousand times. The math is weird, but the hype is real.
This is The Inkey List’s Polyglutamic Acid Serum. $16.99. The claim? A “moisture barrier” effect that outlasts HA.
The Texture
A clear, slightly goopy gel — thicker than their HA serum.
The Feel
Leaves a distinct, slightly tacky film. Not a ghost.
The Price
Under $20. You’re paying for the single ingredient science.
Photo: Content Pixie / Unsplash
The hero is 3% Polyglutamic Acid. It’s a humectant, but it’s also supposed to form a breathable film on top of skin to lock water in.
It’s not a solo act. They added 1% Hyaluronic Acid. A backup singer, not the lead.
- Polyglutamic Acid (3%): Forms a hydrating film on skin
- Hyaluronic Acid (1%): Adds a layer of water-binding
- Squalane: A light, non-greasy emollient
- Betaine: A hydrator that protects skin stress
Applies like a slick gel. That tacky finish is immediate — you feel it for a good 10 minutes. It’s not unpleasant, just… present.
After two weeks, my skin felt consistently cushioned. The surprise? It played nicer over dry patches than HA, which can sometimes pull water from skin if the air is dry.
My foundation went on smoother — no cakey patches. But it’s not a dewy glow. It’s more like a hydrated, matte cushion. Pore appearance? Zero change.
It doesn’t dethrone HA. It’s its strategic partner. PGA is the sealant, HA is the magnet. Together, they’re a powerhouse.