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Polyglutamic Acid Serum
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Text on a white background explaining how to layer Polyglutamic Acid Serum in a skincare routine with steps listed.
Inredients in Polyglutamic Acid Serum
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Polyglutamic Acid Serum
Person applying lip product with text about Polyglutamic Acid Serum benefits

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

Text on a white background explaining how to layer Polyglutamic Acid Serum in a skincare routine with steps listed.
Inredients in Polyglutamic Acid Serum
Hand with a pea-sized amount of Polyglutamic Acid Serum and text on how to use it.
Before and after comparison of a woman's face with a neutral background

Polyglutamic Acid Serum

Lock in moisture for smooth skin instantly

4.4
Rated 4.4 out of 5 stars
4.4 Stars (479 Reviews)
$23.00 / 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 moisturiser.

Suitable for:

  • All skin types
  • Sensitive skin
  • Pregnancy & breastfeeding

Targets:

  • Dehydrated skin
  • Uneven skin texture

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This product
Polyglutamic Acid Serum

Polyglutamic Acid Serum

$23.00 / 30ml
4.4
Rated 4.4 out of 5 stars
4.4 Stars (479 Reviews)
Locking In Moisture & Surface Glow
  • Silky, cushiony serum that sits comfortably on skin and layers beautifully over your HA or actives.
  • Forms a moisture-locking veil on the skin's surface for longer-lasting hydration and a dewy finish.
  • Holds up to 4x more moisture than Hyaluronic Acid* whilst smoothing and softening skin texture.
  • Powered by Polyglutamic Acid + Hyaluronic Acid to seal in hydration and boost surface glow.
Ectoin Hydro-Barrier Serum

Ectoin Hydro-Barrier Serum

$23.00 / 30ml
4.6
Rated 4.6 out of 5 stars
4.6 Stars (434 Reviews)
Dehydrated & Compromised Barrier Skin
  • Lightweight, silky serum that melts in without tackiness for instant, all-day comfort.
  • Deeply hydrates whilst repairing the skin barrier — clinically proven to strengthen it in just 15 minutes.*
  • Shields against daily environmental stress (pollution, aircon, UV) and visibly restores bounce in 3 days.*
  • Powered by 2% Ectoin + 2.5% Multi-Molecular Hyaluronic Acid + 3 Ceramides to hydrate and rebuild resilient skin.
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4.4
Rated 4.4 out of 5 stars
Based on 479 reviews
Reviews Summary
Customers say this serum feels silky and hydrating on the skin, leaving it soft and plump. Many appreciate its lightweight texture and use it as a makeup base, noting it helps foundation apply smoothly and last longer. Users frequently layer it with hyaluronic acid for enhanced moisture retention. While most praise its effectiveness for dry and sensitive skin, several mention a strong chemical or alcohol-like scent. Some report pilling issues when layered with certain products, and a few experienced pump malfunctions. Common feedback includes its versatility for mixing with foundation and its ability to create a dewy, glowing finish.
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479 reviews
  • jennifer m.
    Verified Buyer
    I recommend this product
    Age Range 35 - 44
    Skin Type Dry
    Skin Concerns Dehydration, Dryness, Damaged Skin Barrier, Dull Skin
    How long have you used this product for? 3 months +
    Sensitive Skin Suitability Suitable for my sensitive skin
    Rated 5 out of 5 stars
    2 days ago
    Great

    Just purchased more

    Was this helpful?
  • Leila
    Verified Buyer
    I recommend this product
    Age Range 35 - 44
    Skin Type Sensitive
    Skin Concerns Fine Lines and Wrinkles, Dryness
    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
    4 days ago
    Hydrating and Soothing

    This seems to do a much better job locking in moisture than any of the other serums I tried. It felt silky on. my skin and melted in. I use Tretinoin, and this really helped my skin last winter. I am about to purchase again.

    Was this helpful?
  • Dena Z.
    Verified Buyer
    I recommend this product
    Age Range 35 - 44
    Skin Type Combination
    Skin Concerns Hyperpigmentation
    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
    6 days ago
    Great serum

    Goes on fluid, absorbs nicely. Not sticky or thick. I love in between my vitamin C and moisturizer.

    Was this helpful?

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