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Supersize Hyaluronic Acid Serum - 100ml
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Statistic from clinical study of customers using Hyaluronic Acid Serum
How to layer Hyaluronic Acid Serum in your routine
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Ingredients in Hyaluronic acid serum
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Before and after using Hyaluronic Acid Serum
3 different sizes of Hyaluronic Acid Serum bottles and usage estimate (30ml = 60 uses, 60ml = 120 uses, 100ml = 180 uses)
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Model holding Hyaluronic Acid Serum

Supersize Hyaluronic Acid Serum - 100ml

Instantly hydrates, plumps & firms skin in a lightweight, non-sticky formula

4.7
Rated 4.7 out of 5 stars
4.7 Stars (3,064 Reviews)
£22.00 (Worth £30.00) / 100ml

What you get: A lightweight hydrating serum that delivers instant and lasting hydration, leaving your skin plump, smooth, and ready for the day. The INKEY cult-favourite hydration serum, clinically proven to deliver instant hydration with 82% of users seeing firmer, smoother skin in just 4 weeks**  

Why it works: 2% Multi-Molecular Hyaluronic Acid holds up to 1000x its weight in water, delivering intense hydration across multiple layers of skin and helps boosts absorption of other products. Matrixyl™ 3000 Peptide helps to pump, firm and smooth skin.

How it feels: Lightweight and hydrating. No greasiness, stickiness, or tackiness. 

When to use: AM & PM. Use this moisturising serum right after your cleanse.   


**4-week independent consumer study of 22 people under dermatological control

Suitable for:

  • All skin types
  • Sensitive skin
  • Pregnancy & breastfeeding
  • Teen approved

Targets:

  • Dehydrated skin
  • Fine lines & wrinkles
  • Damaged skin barrier

Awards & Features

  • Glamour
  • Allure 2022 Award
  • CEW 2023 Award
  • get the gloss
  • get the gloss

The cult-favourite, hydration serum that hero that kicked off the INKEY obsession

Clinically proven to deliver instant hydration, plump, firm & smooth skin whilst helping to boost the efficacy of every product you layer on top.

  • Hydrates & plumps with immediate results

  • Improve skin firmness by 82% in 4 weeks**

  • Boost absorption of other products in a lightweight, non-sticky formula

Delivery info

Standard tracked delivery (Evri)

  • £3.99 or FREE on orders over £30. (2-5 working days*) 

Express tracked delivery (Evri)

  • £5.95 or FREE on orders £50+. (Up to 2 working days if ordered before 8pm, excluding weekends*)

*Find out more about delivery options and delivery area restrictions here.

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Supersize Hyaluronic Acid Serum - 100ml

Supersize Hyaluronic Acid Serum - 100ml

  • • Instantly hydrates with 2% multi-molecular Hyaluronic Acid.
  • • Plumps fine lines and smooths skin texture in 4 weeks**
  • • Award-winning lightweight formula - suitable for all skin types

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Ectoin Hydro-Barrier Serum

Ectoin Hydro-Barrier Serum

  • • Repairs compromised skin barrier in 15 minutes*
  • • Clinically proven to improve skin bounce and smoothness in 7 days*
  • • Ideal for sensitive, dry or irritated skin

Still not sure?

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  • Before and after showing results of Supersize Hyaluronic Acid Serum - 100ml
    "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 showing results of Supersize Hyaluronic Acid Serum - 100ml

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

    Keanu

  • Before and after showing results of Supersize Hyaluronic Acid Serum - 100ml
    "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 showing results of Supersize Hyaluronic Acid Serum - 100ml
    "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 showing results of Supersize Hyaluronic Acid Serum - 100ml
    "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 showing results of Supersize Hyaluronic Acid Serum - 100ml
    "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 showing results of Supersize Hyaluronic Acid Serum - 100ml
    "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 3,064 reviews
Total 5 star reviews: 2.5k Total 4 star reviews: 436 Total 3 star reviews: 69 Total 2 star reviews: 29 Total 1 star reviews: 43
Reviews Summary
Customers say this serum leaves their skin feeling soft, hydrated, and plump after use. Many appreciate the lightweight texture that absorbs quickly without stickiness, making it ideal as a first step after cleansing. Users frequently mention applying it to damp skin for better absorption and layering it under moisturizers and other products. Most find it works well for both morning and evening routines. Several customers note they've repurchased multiple times and consider it a skincare staple. While the majority praise its hydrating effects, a few users found it less effective than expected or experienced issues with packaging.
3,064 reviews
  • Gail G.
    Verified Buyer
    Reviewing
    FREE Hyaluronic Acid Serum 30ml
    I recommend this product
    Age Range 65+
    Skin Type Sensitive
    Skin Concerns Fine Lines and Wrinkles, Hyperpigmentation, Under Eye Circles
    Have you purchased an INKEY List product before? Yes
    How long have you used this product for? 1 month - 3 months
    Sensitive Skin Suitability Suitable for my sensitive skin
    Rated 5 out of 5 stars
    10 hours ago
    Doesn’t irritate

    As I have sensitive skin, I worry about new products.

    I had no reaction to this at all . Skin felt very soft the next day

  • Eamonn M.
    Verified Buyer
    Reviewing
    Supersize Hyaluronic Acid Serum - 100ml
    I recommend this product
    Age Range 35 - 44
    Skin Type Combination
    Skin Concerns Dehydration, Fine Lines and Wrinkles
    Have you purchased an INKEY List product before? Yes
    How long have you used this product for? 1-3 weeks
    Rated 5 out of 5 stars
    17 hours ago
    I like it

    Friend advised and I feel like it does what its supposed to can see results with use

  • Rae V.
    Verified Buyer
    Reviewing
    Supersize Hyaluronic Acid Serum - 100ml
    I recommend this product
    Age Range 65+
    Skin Type Dry
    Skin Concerns Hyperpigmentation, Fine Lines and Wrinkles, Dryness, Under Eye Circles, Texture
    Have you purchased an INKEY List product before? Yes
    How long have you used this product for? 3 months +
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    18 hours ago
    Supersize Hyaluronic Acid Serum

    My favorite hyaluronic acid. Bought multiple times and I love the results. It leaves my skin smooth and hydrated.