FREE full size cleanser* (worth €14) Take our Skincare Quiz >

FREE standard shipping over €45*

Supersize Hyaluronic Acid Serum Duo
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
Available in 3 sizes 30ml, 60 uses, 100ml 180 uses, 60ml 120 uses
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 bestselling hydration super serum, now 3x the size!

4.7
Rated 4.7 out of 5 stars
4.7 Stars (2,030 Reviews)
€49,00 / 2 full-size products

Loading…

Revive your complexion and go BIG on hydration.

Our award-winning Hyaluronic Acid Serum serum is now 3x bigger and doubled up so you get more of the same powerhouse formula you know and love. Easily absorbed, non-tacky and working across multiple layers of the skin, it helps to lock in moisture, restoring your skin's plumpness and smoothness, while reducing the appearance of fine lines.

Discover More about Hyaluronic Acid Serum.

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

  • (calculated at checkout, shipping destination dependent)

  • 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.

Track the status of your parcel with
our trusted couriers

Still not sure?

Take our Skin Quiz, choose your personalized routine and get FREE products.

Take The Quiz arrow
  • 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 2,030 reviews
Total 5 star reviews: 1.6k Total 4 star reviews: 266 Total 3 star reviews: 54 Total 2 star reviews: 27 Total 1 star reviews: 37
2,030 reviews
  • Jean Fisher F.
    Verified Buyer
    Hyaluronic Acid Serum - 60ml
    Reviewing
    Hyaluronic Acid Serum - 60ml
    I recommend this product
    Age Range 65+
    Skin Type Dry
    Skin Concerns Hyperpigmentation, Fine Lines and Wrinkles, Dryness, Puffiness
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    8 hours ago
    Hyaluronic Acid serum vs. Polyglutamic Acid serum

    Not sure yet which I like best-HAS or PGAS. Both give skin a nice plump, moist feeling. I think PGAS leaves my skin a little less tacky than HAS does, but I kind of prefer the smoothness of HAS better. So it’s a toss-up. I do reallly appreciate the Dewy SPF 30 PGAS moisturizer for day use but if you rub your skin, it will roll up under your fingers. I’m

  • Emily T.
    Verified Buyer
    Hyaluronic Acid Serum - 30ml
    Reviewing
    Hyaluronic Acid Serum - 30ml
    I recommend this product
    Age Range 35 - 44
    Skin Type Normal
    Skin Concerns Hyperpigmentation, Redness, Fine Lines and Wrinkles, Dryness, Blackheads
    Rated 5 out of 5 stars
    11 hours ago
    Love this so much, purchased for travel

    I’ve been using this for over a year. I purchased the supersize bottle which lasted me the entire year while using liberally twice a day, and loved it so much I bought this 30ml size to bring with me when I travel. Texture goes on smoothly and non-tacky as long as you use immediately on damp face after washing.

  • Emily T.
    Verified Buyer
    Supersize Hyaluronic Acid Serum - 100ml
    Reviewing
    Supersize Hyaluronic Acid Serum - 100ml
    I recommend this product
    Age Range 35 - 44
    Skin Type Normal
    Skin Concerns Hyperpigmentation, Redness, Fine Lines and Wrinkles, Dryness, Blackheads
    Rated 5 out of 5 stars
    11 hours ago
    Effective and non-tacky

    Love the texture of this. Goes on smooth (use while face is damp post face wash) and the supersize bottle lasts me a whole year while using liberally twice a day! Skin feels smooth and hydrated after use. It’s a must have in my daily skincare routine! I also purchased the 30ml bottle for travel.

Reviews LoadedReviews Added