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Polyglutamic Acid Serum
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Ingredients in Polyglutamic Acid Serum
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Polyglutamic Acid Serum

Lock in moisture for smooth skin instantly

4.4
Rated 4.4 out of 5 stars
4.4 Stars (509 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

Awards & Features

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  • £3.99 or FREE on orders over £30. (2-5 working days*) 

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

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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.

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4.4
Rated 4.4 out of 5 stars
Based on 509 reviews
Total 5 star reviews: 361 Total 4 star reviews: 77 Total 3 star reviews: 31 Total 2 star reviews: 18 Total 1 star reviews: 22
Reviews Summary
Customers say this serum has a silky, smooth texture that glides easily onto skin. Many reviews mention enhanced hydration and a dewy, glowing finish. The product works well under makeup, with several users mixing it into their foundation for better application. While most praise its moisturizing effects, some note a strong scent and occasional pilling with other products. Common feedback includes soft, plump-feeling skin after use. A few users report issues with the pump mechanism, though most find the product's consistency ideal - neither too thick nor too thin.
509 reviews
  • Ari A.
    Verified Buyer
    I recommend this product
    Age Range 35 - 44
    Skin Type Combination
    Skin Concerns Fine Lines and Wrinkles, Under Eye Circles, Redness, Dryness, Oiliness
    Have you purchased an INKEY List product before? Yes
    How long have you used this product for? 1-3 weeks
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    5 hours ago
    This enhances and smoothens skin 10/10

    This the first Polyglutamic Acid Serum I've bought and it is now my go-to-hydration-serum. You can feel the difference within the first week and the skin feels extremely soft, light and firm - I think the skin looks also significantly better after using this. I combine Niacinamide Serum, Vitamin C and Hyaluronic Acid Serum in my morning routine with this new Serum - I just love it.

  • Chase P.
    Verified Buyer
    I recommend this product
    Age Range 25 - 34
    Skin Type Normal
    Skin Concerns Under Eye Circles, Texture, Redness, Dryness, Hyperpigmentation
    Have you purchased an INKEY List product before? Yes
    How long have you used this product for? 3 months +
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    15 hours ago
    This stuff is magic.

    paired with the Ectoin Serum, they are the duo we've been waiting for. sisters in arms. my face and beard has never flaked less.

  • Shakira M.
    Verified Buyer
    I recommend this product
    Age Range 25 - 34
    Skin Type Sensitive
    Skin Concerns Breakouts, Fine Lines and Wrinkles, Hyperpigmentation, Acne Scars, Texture
    Have you purchased an INKEY List product before? Yes
    How long have you used this product for? 1 month - 3 months
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    2 months ago
    Great hydration booster

    I use this on days where my skin feels rough and dull especially when I am under the weather. It's a great pick me up and adds an additional slip for skincare applied after.