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

FREE standard shipping over €45*

Hyaluronic Acid Serum 100ml bottle
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 100ml Hyaluronic Acid Serum
Model with Hyaluronic Acid Serum on skin

Supersize Hyaluronic Acid Serum - 100ml | The INKEY List

Our bestselling hydration super serum, now 3x the size!

4.7
Rated 4.7 out of 5 stars
4.7 Stars (2,032 Reviews)
€24,50 / 100ml

Loading…

You asked, we delivered! Our award-winning #1 bestseller Hyaluronic Acid Serum is now 3x bigger. Designed with the same bestselling formula as our 30ml version, this serum helps your other skincare work harder. Clinically proven to deliver instant and lasting hydration, this non-tacky hydrating serum leaves skin feeling plump, smooth and healthy.

Formulated with 2% multi-molecular Hyaluronic Acid, this powerful moisture-binding ingredient can hold up to 1000x its weight in water, which is essential for maintaining skin hydration and plumpness. Lightweight and rapidly absorbed on contact with the skin, the combination of high and low molecular weight HA helps the serum deliver hydration across multiple layers of the skin's surface. ​

Suitable for all skin types, it glides on and instantly melts into the skin leaving you with a hydrated, dewy base. Helping to combat dry skin, improve the appearance of fine lines and helps maintain an effective skin barrier, it’s a must-have for every skincare routine.​

Available in travel size 30ml version Shop now and in our INKEY exclusive Supersize Hyaluronic Acid Serum Duo Shop now.
Discover More about Hyaluronic Acid Serum.

Suitable for:

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

Targets:

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

Proud to be:

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

Awards & Features

Featured on Glamour Magazine
Best Steals Allure Magazine Best of Beauty 2022
CEW award  2023
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 2,032 reviews
Total 5 star reviews: 1.6k Total 4 star reviews: 267 Total 3 star reviews: 54 Total 2 star reviews: 27 Total 1 star reviews: 37
2,032 reviews
  • Hannah S.
    Verified Buyer
    Hyaluronic Acid Serum - 30ml
    Reviewing
    Hyaluronic Acid Serum - 30ml
    I recommend this product
    Age Range 25 - 34
    Skin Type Dry
    Skin Concerns Texture, Breakouts, Fine Lines and Wrinkles
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    2 hours ago
    Good and basic

    A little sticky but very effective. Basic but that's what I wanted. V

  • Alyssa D.
    Verified Buyer
    Hyaluronic Acid Serum - 30ml
    Reviewing
    Hyaluronic Acid Serum - 30ml
    I recommend this product
    Age Range 35 - 44
    Skin Type Combination
    Skin Concerns Breakouts, Fine Lines and Wrinkles, Texture
    Sensitive Skin Friendly? Yes
    Rated 4 out of 5 stars
    16 hours ago
    Light Serum

    This serum is pretty lightweight going on and I haven't had any breakouts due to this. I have pretty sensitive skin so it's a good sign that this serum doesn't add to any extra breakouts or sensitive skin issues.

  • 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
    Yesterday
    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

Reviews LoadedReviews Added