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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 (2,362 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

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
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  • €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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  • 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 2,362 reviews
Total 5 star reviews: 1.9k Total 4 star reviews: 325 Total 3 star reviews: 60 Total 2 star reviews: 27 Total 1 star reviews: 40
Reviews Summary
Customers say this serum feels light and absorbs quickly into their skin. Many reviews highlight its non-sticky texture and excellent layering ability with other products. Users particularly appreciate how it keeps their skin hydrated throughout the day, with frequent mentions of a plumping effect. While most find it works well for their daily routine, some note they need more product to achieve desired results. Reviews consistently mention its suitability for year-round use, though several suggest it works best when applied to damp skin. Long-term users report making this a permanent part of their skincare routine, with many mentioning repeat purchases.
2,362 reviews
  • Andree S.
    Verified Buyer
    Reviewing
    Supersize Hyaluronic Acid Serum 100ml Duo
    I recommend this product
    Age Range 65+
    Skin Type Dry
    Skin Concerns Fine Lines and Wrinkles, Acne Scars, Under Eye Circles
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    4 minutes ago
    Great

    Leaves skin feeling really soft

  • Katherine O.
    Verified Buyer
    Reviewing
    Hyaluronic Acid Serum - 30ml
    I recommend this product
    Age Range 65+
    Skin Type Dry
    Skin Concerns Hyperpigmentation, Dryness, Fine Lines and Wrinkles, Under Eye Circles, Plumping
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    22 hours ago
    Love Hyaluronic acid serum

    I’ve been using this serum for a couple of years. Love the moisture it gives my face.

  • Rachel M.
    Verified Buyer
    Reviewing
    Hyaluronic Acid Serum - 60ml
    I recommend this product
    Age Range 35 - 44
    Skin Type Combination
    Skin Concerns Breakouts, Fine Lines and Wrinkles, Blackheads, Hyperpigmentation
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    3 days ago
    Hydrating serum

    I use this everyday and it’s really made a difference to my dryness and acne. Used a long side other products it works really well. Keep my skin hydrated and non sticky. No smell. Kind to my sensitive skin. This is my 5th bottle.