The INKEY List
Polyglutamic Acid Serum
2 images of a model's face side by side to show the before and after using Polyglutamic Acid Serum just once
How to layer Polyglutamic Acid Serum in your routine
Hand holding a bottle of Polyglutamic Acid Serum with text saying how and when to apply it
Key benefits of using Polyglutamic Acid Serum
Polyglutamic Acid Serum
2 images of a model's face side by side to show the before and after using Polyglutamic Acid Serum just once
How to layer Polyglutamic Acid Serum in your routine

How to layer Polyglutamic Acid Serum in your routine. Step 1: Cleanse. Step 2: Hyaluronic Acid Serum. Step 3: Polyglutamic Acid Serum. Step 4: Eye Treatment. Step 5: Moisturize. Step 6: SPF

Hand holding a bottle of Polyglutamic Acid Serum with text saying how and when to apply it
Key benefits of using Polyglutamic Acid Serum

Polyglutamic Acid Serum | The INKEY List

Lock in moisture for smooth skin instantly

4.4
Rated 4.4 out of 5 stars
4.4 Stars (477 Reviews)
£15.00 / 30ml

WHAT YOU GET: A smoothing serum that locks in moisture and instantly softens the look of fine lines—great for layering and makeup prep.

WHY IT WORKS: 3% Polyglutamic Acid complex holds 4x more moisture than Hyaluronic Acid. 2% Invisaskin supports long-lasting hydration and smoother skin texture.

HOW IT FEELS: Silky, lightweight, and smoothing. Absorbs fast.

WHEN TO USE: AM & PM. Use as your last serum before moisturiser.

Suitable for:

  • All Skin Types
  • Sensitive Skin
  • Pregnancy & Breastfeeding

Targets:

  • Uneven Skin Texture
  • Dehydrated Skin

Delivery info

Standard tracked delivery (Evri)

  • £3.99 or FREE on your first order & orders over £30
  • (2-5 working days*) 

Express tracked delivery (Evri)

  • £5.95 or FREE on orders £50+
  • (Up to 2 working days if ordered before 8pm, excluding weekends*)

*Find out more about delivery options and delivery area restrictions here.

Track the status of your parcel with
our trusted couriers

Compare with...

This product

Have you tried?

This product

Polyglutamic Acid Serum

Polyglutamic Acid Serum

  • • Locks in hydration on the skin’s surface for smoother, bouncier-looking skin.
  • • Instantly softens fine lines and evens texture—perfect under makeup or worn alone.
  • • Best for sealing in moisture and creating a smooth canvas.

or

Have you tried?

Hyaluronic Acid Serum - 30ml

Hyaluronic Acid Serum - 30ml

  • • Pulls water into the deeper layers of skin for immediate and long-lasting hydration.
  • • Plumps and smooths the look of fine lines while supporting a healthy skin barrier.
  • • Best as your first serum to boost every step that follows.
More Info

Still not sure?

Take our Skin Quiz, choose your personalised routine and get FREE products.

Take The Quiz
More Blogs arrow
Before results

Callie has used INKEY products for 2 years. She used Polyglutamic Acid in her routine with Salicylic Acid Cleanser, Hyaluronic Acid Serum, Glycolic Acid Toner, Succinic Acid Blemish Treatment, 15% Vitamin C & EGF, Symbright Moisturiser and Rosehip Oil to improve her skin.

Verified Purchase
4.4
Rated 4.4 out of 5 stars
Based on 477 reviews
Total 5 star reviews: 335 Total 4 star reviews: 73 Total 3 star reviews: 31 Total 2 star reviews: 17 Total 1 star reviews: 21
Reviews Summary
Customers say this serum has a silky, primer-like texture that leaves skin feeling hydrated and smooth. Many reviews mention its effectiveness as a makeup base, though some note it can pill under certain products. The serum works well in combination with other products, particularly hyaluronic acid. While most find it deeply moisturizing, some report a strong scent that feels chemical-like. Reviews are mixed on sensitivity reactions - while many praise its gentleness, others experienced irritation. Common feedback includes its ability to create a dewy finish and lock in moisture, especially during dry weather. Some note it doesn't spread easily and requires careful product layering for best results.
Write a Review (Opens in a new window)
477 reviews
  • Vesta G.
    Verified Buyer
    I recommend this product
    Age Range 55 - 64
    Skin Type Dry
    Skin Concerns Fine Lines and Wrinkles, Dryness
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    Yesterday
    Good serum.

    It´s so silky.

    Was this helpful?
  • Harmony W.
    Verified Buyer
    I recommend this product
    Age Range 45 - 54
    Skin Type Combination
    Skin Concerns Fine Lines and Wrinkles, Texture, Redness
    Sensitive Skin Friendly? No
    Rated 5 out of 5 stars
    1 week ago
    Love this stuff

    Moisturizing and non irritating on my very, very sensitive skin. I use this every night under moisturizer.

    Was this helpful?
  • Konstantinos T.
    Verified Buyer
    I recommend this product
    Age Range 18 - 24
    Skin Type Combination
    Skin Concerns Acne Scars, Plumping, Texture, Hyperpigmentation, Breakouts
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    2 weeks ago
    Life saver!

    This completely changed my makeup game. I have to use a lot of powder so my skin always looked dry and the maekup cracked after many hours, but using this before and after makeup has both made it look and feel amazing. My favorite product by them.

    Was this helpful?

Continue shopping

Skincare Sets NEW Exosome Hydro-Glow Complex Moisturisers