The INKEY List
Polyglutamic Acid Serum
2 images of a model's face side by side to show before and after using Polyglutamic Acid Serum once
How to layer Polyglutamic Acid Serum in your routine
Infographic to explain how and when to use it with text that reads 'Amount to apply (pea-sized amount)' and 'When to apply (AM and PM)'
Key benefits of using Polyglutamic Acid Serum
Polyglutamic Acid Serum
2 images of a model's face side by side to show before and after using Polyglutamic Acid Serum 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

Infographic to explain how and when to use it with text that reads 'Amount to apply (pea-sized amount)' and 'When to apply (AM and PM)'
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 (467 Reviews)
€16,00 / 30ml
from €11,20 / 30ml

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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 moisturizer.

Suitable for:

  • All Skin Types
  • Sensitive Skin
  • Pregnancy & Breastfeeding

Targets:

  • Uneven Skin Texture
  • Dehydrated Skin

Shipping info

Standard EU Tracked Shipping

  • €5.95**
  • FREE on your first order & over €45**
  • (2-5 business days*)

**The following countries are subject to increased Standard Tracked Shipping rates and increased FREE shipping thresholds. In addition, Express Shipping is not available to these countries.

  • €6.95 - Denmark, Finland, Switzerland, Estonia, Luxembourg - FREE on your first order & over €45
  • €8.95 - Spain, Portugal, Greece, Sweden, Croatia, Bulgaria, Romania - FREE on your first order & over €55
  • €11.95 - Malta, Cyprus, Iceland, Serbia, North Macedonia, Bosnia & Herzegovina, Monaco - FREE on your first order & over €65.

Express EU Tracked Shipping

  • €11.95
  • (up to 4 business days*, if ordered before 4pm CET on business days) 

Tariff or duties

  • Orders with EU shipping destinations won't be subject to any tariff or duties, however please note that there are a small number of EU and European territories that still require tariffs and duties that will need to be covered by the customer.

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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

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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 Moisturizer and Rosehip Oil to improve her skin.

Callie Hammond

Verified Purchase
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4.4
Rated 4.4 out of 5 stars
Based on 467 reviews
Total 5 star reviews: 319 Total 4 star reviews: 76 Total 3 star reviews: 30 Total 2 star reviews: 17 Total 1 star reviews: 25
Reviews Summary
Customers say this serum has a silky, smooth texture that leaves skin feeling soft and hydrated. Many reviews mention its effectiveness under makeup and ability to mix with foundation for a dewy finish. While most praise its moisturizing properties, some note a strong scent and occasional pilling with other products. The texture is described as thicker than similar serums, with users particularly appreciating its performance during dry weather. Common feedback includes its compatibility with other serums and its plumping effect on the skin.
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467 reviews
  • Harmony W.
    Verified Buyer
    Reviewing
    Polyglutamic Acid Serum
    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
    4 days 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
    Reviewing
    Polyglutamic Acid Serum
    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
    1 week 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?
  • Monika P.
    Verified Buyer
    Reviewing
    Polyglutamic Acid Serum
    I recommend this product
    Age Range 45 - 54
    Skin Type Normal
    Skin Concerns Dryness
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    2 weeks ago
    Excellent product

    My skin is hydrated and happy.

    Was this helpful?

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