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Supersize Hyaluronic Acid Serum - 100ml
Available in 3 sizes. 30ml (60 uses), 60ml (120 uses), 100ml (180 uses)
Before and after 1 use of HA Serum, showing plumper skin
How to layer Hyaluronic Acid Serum in your routine. Step 2, Hydrate
Key claim from clinical trial of using Hyaluronic Acid Serum
Amount of Hyaluronic Acid Serum to apply
When to apply Hyaluronic Acid Serum
Ingredients of Hyaluronic Acid Serum
Model holding Hyaluronic Acid Serum
Model applying Hyaluronic Acid Serum to her face

Supersize Hyaluronic Acid Serum - 100ml | The INKEY List

Non-tacky hydrating serum for all skin types, now x3 the size!

4.7
Rated 4.7 out of 5 stars
4.7 Stars (2,605 Reviews)
£22.00 (Worth £30.00) / 100ml

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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.​

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

Glamour
Allure 2022 Award
CEW 2023 Award
Cosmopolitan Feature

Delivery info

Standard tracked delivery (Royal Mail)

  • £3.99 or FREE on your first order & orders over £30
  • (2-5 working days*) 

Express tracked delivery (Royal Mail)

  • £5.95 or FREE on orders £50+
  • (Up to 2 working days if ordered before 4pm, excluding weekends*)

*Find out more about Delivery 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 2,605 reviews
Total 5 star reviews: 2.1k Total 4 star reviews: 349 Total 3 star reviews: 64 Total 2 star reviews: 29 Total 1 star reviews: 42
Reviews Summary
Customers say this serum provides excellent hydration and absorbs quickly into the skin. Many reviews mention its lightweight, non-sticky texture that layers well with other products. The serum receives praise for making skin feel plump and soft, with long-time users noting it as a consistent part of their routine. While most find it effective, some mention it feels slightly sticky. Reviews highlight its versatility across different seasons, with many appreciating the larger bottle size and value for money.
2,605 reviews
  • Denise F.
    Verified Buyer
    Reviewing
    Hyaluronic Acid Serum - 30ml
    I recommend this product
    Age Range 25 - 34
    Skin Type Combination
    Skin Concerns Redness, Oiliness, Acne Scars
    Sensitive Skin Friendly? Yes
    Rated 4 out of 5 stars
    5 hours ago
    Versatile serum

    Such an easy way to hydrate skin quickly! Put it on after cleanser and it feels like it preps the skin well. Pair this with vitamin C serum.

  • ASHLEY E.
    Verified Buyer
    Reviewing
    Supersize Hyaluronic Acid Serum - 100ml
    I recommend this product
    Age Range 35 - 44
    Skin Type Normal
    Skin Concerns Hyperpigmentation, Fine Lines and Wrinkles, Under Eye Circles
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    9 hours ago
    So glad I got the bigger bottle!

    I just had microneedling done and this is saving my skin in the regeneration process! I can use it as much as I want because it’s so hydrating and helps with the healing. 10/10 will be buying again!

  • linda Mary B.
    Verified Buyer
    Reviewing
    Supersize Hyaluronic Acid Serum 100ml Duo
    I recommend this product
    Age Range 65+
    Skin Type Normal
    Skin Concerns Fine Lines and Wrinkles, Texture, Plumping, Puffiness, Dehydration
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    15 hours ago
    Perfect

    My skin feels amazing, this magical bottle has done wonders for my now tighten faco