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Supersize Hyaluronic Acid Serum 100ml Duo
Available in 3 sizes 30ml, 60 uses, 100ml 180 uses, 60ml 120 uses
Before and after side by side from results using Hyaluronic Acid Serum
How to layer in your routine 1. Cleanse 2. HA Serum 3. Treat 4. Eye Treatment 5. Moisturize 6. SPF
Key claim from clinical trial of using Hyaluronic Acid Serum
Amount to apply: Pea-sized amount
Apply am + pm
Key ingredients for Hyaluronic Acid Serum
Model with Hyaluronic Acid Serum on skin
Model with 100ml Hyaluronic Acid Serum

Supersize Hyaluronic Acid Serum 100ml Duo | The INKEY List

Double up on our non-tacky hydrating serum, now x3 the size!

4.7
Rated 4.7 out of 5 stars
4.7 Stars (2,283 Reviews)
€41,80 €44,00 / 2 full-size products
Revive your complexion and go BIG on hydration with our award-winning Hyaluronic Acid Serum—now 3x bigger and in a duo for even more of the powerful formula you know and love.

This fast-absorbing, non-tacky serum works across multiple layers of the skin to lock in moisture, restoring your skin's plumpness and smoothness while visibly reducing the appearance of fine lines. Perfect for all skin types, it glides on effortlessly and instantly melts into the skin, leaving you with a hydrated, dewy base.

Ideal for combating dry skin, improving the appearance of fine lines, and maintaining a strong skin barrier, this must-have serum is a game-changer for any skincare routine.

This duo includes: 2x Hyaluronic Acid Serum (100ml)

Suitable for:

  • All Skin Types
  • Sensitive Skin
  • Pregnancy & Breastfeeding
  • Teen Approved

Targets:

  • Fine Lines & Wrinkles
  • Dehydrated Skin
  • Damaged Skin Barrier

Proud to be:

  • Carbon Net-Zero
  • Cruelty Free
  • Vegan
  • Recyclable
  • B-Corp
  • theinkeylist.com exclusive

Awards & Features

Glamour
Allure 2022 Award
CEW 2023 award winner
Cosmopolitan

Delivery info

  • Standard EU Tracked Shipping

  • €5.95 (2-5 business days*). FREE on orders above €45**.

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

  • €6.95 - Denmark, Finland, Switzerland, Estonia, Luxembourg - (2-5 business days*). FREE on order over €45.
  • €8.95 - Spain, Portugal, Greece, Sweden, Croatia, Bulgaria, Romania - (2-5 business days*). FREE on order over €55.
  • €11.95 - Malta, Cyprus, Iceland, Serbia, North Macedonia, Bosnia & Herzegovina, Monaco - (2-5 business days*). FREE on 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.

*Find out more about shipping here.

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  • Before and after comparison
    "I decided to try Hyaluronic Acid Serum as I'm struggling with acne dry skin from medications. I've been using it for more than a year and my skin is glowing and feels softer than ever! I would definitely recommend this product if you want change your skin for better!"

    Katarzyna

  • Before and after comparison

    "You have been a part of the past 2 years of my skincare journey. Thank you INKEY!"

    Keanu

  • Before and after comparison
    "I’ve used INKEY products religiously and my skin is just amazing! This is before I started and what it is like now. My skin's never been better!"

    Adelle

  • Before and after comparison
    "The INKEY List is the only skincare that's helped my acne-prone skin due to my polycystic ovaries". Lauren has been using Oat Cleansing Balm, Salicylic Acid Cleanser, Hyaluronic Acid Serum, Succinic Acid Treatment and Omega Water Cream since December 2022."

    Lauren

  • Before and after comparison
    "Just wanted to say I’ve been using your brand for just over a month and the products have really helped with my acne and the scarring! They are amazing and the results are incredible."

    Amy

  • Before and after comparison
    "I used the online askINKEY service and chose the Hyaluronic Acid Serum, the Succinic Acid Treatment, and the Omega Water Cream. These are my results after 3 months ❤️ "

    Chloe

  • Before and after comparison
    "Your products have helped me become so much more confident and happy in my skin!"

    Tatiana

4.7
Rated 4.7 out of 5 stars
Based on 2,283 reviews
Total 5 star reviews: 1.9k Total 4 star reviews: 310 Total 3 star reviews: 57 Total 2 star reviews: 27 Total 1 star reviews: 39
2,283 reviews
  • Julia
    Verified Reviewer
    Reviewing
    Hyaluronic Acid Serum - 60ml
    I recommend this product
    Age Range 18 - 24
    Skin Type Dry
    Skin Concerns Texture, Dryness, Blackheads, Breakouts
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    17 hours ago
    The best!!

    I love this serum, I had a problem with eczema on my face for a long time, after treating the problem with preparations from the pharmacy, the problem always returned. I decided to introduce this serum to my daily routine and since then the problem has disappeared.

  • Eileen P.
    Verified Buyer
    Reviewing
    Supersize Hyaluronic Acid Serum - 100ml
    I recommend this product
    Age Range 65+
    Skin Type Dry
    Skin Concerns Redness, Hyperpigmentation, Fine Lines and Wrinkles, Dryness
    Sensitive Skin Friendly? Yes
    Rated 4 out of 5 stars
    4 days ago
    It works!

    It could be just a little more soothing but it spreads nicely and is exceptionally hydrating for my very dry, dehydrated, sensitive skin.

  • Linn
    Verified Buyer
    Reviewing
    Supersize Hyaluronic Acid Serum - 100ml
    I recommend this product
    Age Range 25 - 34
    Skin Type Dry
    Skin Concerns Dryness, Breakouts, Texture, Fine Lines and Wrinkles, Redness
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    4 days ago
    Love in a bottle

    This is my absolut favorite product!!

    Leaves my skin feeling flexible, bouncy and moisturized.

    Truly amazing 😍

    This is one of the products that finally got me acne free!

    I’ve had seasonal acne for about 17 years, which means that I have acne from september to may each winter season (living in sweden it’s dark and cold these months)

    Last fall I got my first full skincare routine from the inkey list and after a few weeks of awkwardness while my skin adjusted to the new products my skin started looking glowy, my acne cleared up and I could go to work without makeup and feel good about myself and my skin 🥹🫶🏼

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