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TIRTIR SOS Serum — soothing recovery serum

Collection: Polyglutamic Acid Skincare | Korean Serums for Deep Hydration

Lock in lasting moisture with Polyglutamic Acid skincare. Polyglutamic acid (PGA) is a powerful humectant said to hold even more moisture than hyaluronic acid, forming a hydrating veil on the skin's surface to plump, smooth and lock in lasting hydration. Our polyglutamic acid skincare is ideal for dry, dehydrated and dull skin, leaving it plump, smooth and deeply hydrated.

Problems This Solves

Polyglutamic acid helps improve dryness, dehydration, dullness, rough texture and tight, thirsty skin by sealing in intense moisture for plump, smooth, dewy and deeply hydrated skin.

Key Benefits You'll Get

Expect plump, dewy, deeply hydrated skin, a smoother softer texture, a moisture-locking veil on the surface, and a fresh, healthy, glowing complexion.

Shop Polyglutamic Acid by Category

Explore hydration across Serums & Essences, Creams, Toners, Masks and Hyaluronic Acid.

Pairs Well With

Layer polyglutamic acid with Hyaluronic Acid for deeper hydration, Ceramide for barrier repair, Niacinamide for balance, and Panthenol to soothe.

Best-Selling Brands

Shop polyglutamic acid from THE INKEY LIST, and explore more hydration heroes across our Hyaluronic Acid and Beta-Glucan collections.

How to Use

Cleanse with a gentle cleanser, apply a hydrating toner, layer a polyglutamic acid serum onto damp skin, then seal with a moisturizer to lock in lasting hydration.

Frequently Asked Questions

What does polyglutamic acid do for the skin?

Polyglutamic acid (PGA) is a powerful humectant that draws in and locks moisture onto the skin's surface, helping plump, smooth and deeply hydrate dry, dehydrated skin.

Is polyglutamic acid better than hyaluronic acid?

Polyglutamic acid is said to hold even more moisture than hyaluronic acid and works more on the surface. They're often used together for layered, longer-lasting hydration.

Can I use polyglutamic acid with hyaluronic acid?

Yes. They make a great hydrating pair — hyaluronic acid draws moisture deeper while polyglutamic acid seals it on the surface for plumper, dewier skin.

Is polyglutamic acid good for dry skin?

Yes. Polyglutamic acid is excellent for dry and dehydrated skin, helping lock in lasting moisture for a plump, smooth, dewy and comfortable complexion.

How do I apply polyglutamic acid?

Apply it onto slightly damp skin after toner, then seal with a moisturizer to trap the hydration. Use morning and night for plump, dewy, hydrated skin.