20% off everything! Use code CHEERS Shop now >

FREE Standard delivery on all orders. Limited time only

Supersize Hyaluronic Acid Serum 100ml Duo
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
Available in 3 sizes. 30ml (60 uses), 60ml (120 uses), 100ml (180 uses)
Ingredients of Hyaluronic Acid Serum
Model applying Hyaluronic Acid Serum to her face
Model holding Hyaluronic Acid Serum

Supersize Hyaluronic Acid Serum 100ml Duo | The INKEY List

Double up on our non-tacky hydrating serum, now 3x the size!

4.7
Rated 4.7 out of 5 stars
4.7 Stars (2,406 Reviews)
£44.00 / 2 full-size products

20% off everything! Use code CHEERS

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.

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

Awards & Features

Glamour
Allure 2022 Award
CEW 2023 Award
Cosmopolitan Feature

Delivery info

Standard tracked delivery (Royal Mail)

£3.99
(2-5 working days*)

FREE standard tracked delivery on orders over £30

Express tracked delivery (Royal Mail)

£5.95 (Up to 2 working days if ordered before 4pm, excluding weekends*)

FREE express tracked delivery on orders £50+

*Find out more about Delivery here.

Track the status of your parcel with
our trusted couriers

Still not sure?

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

Take The Quiz
  • 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 2,406 reviews
Total 5 star reviews: 2k Total 4 star reviews: 307 Total 3 star reviews: 57 Total 2 star reviews: 28 Total 1 star reviews: 39
2,406 reviews
  • Luis V.
    Verified Buyer
    Supersize Hyaluronic Acid Serum 100ml Duo
    Reviewing
    Supersize Hyaluronic Acid Serum 100ml Duo
    I recommend this product
    Age Range 45 - 54
    Skin Type Normal
    Skin Concerns Fine Lines and Wrinkles, Redness
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    3 hours ago
    great value!

    great value for the quality. buy this if you want to save some bucks. great moisturizer.

  • Roni G.
    Verified Buyer
    Supersize Hyaluronic Acid Serum - 100ml
    Reviewing
    Supersize Hyaluronic Acid Serum - 100ml
    I recommend this product
    Age Range 25 - 34
    Skin Type Combination
    Skin Concerns Hyperpigmentation, Oiliness, Acne Scars, Under Eye Circles, Breakouts
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    13 hours ago
    Perfect for hydration!

    I don't think I go a day without this serum in my routine be it staying home or going out. I've been using it consistently for the past 4 months now ajd have noticed an incredible difference in my skin's oil levels and overall hydration. It's a must-have.

  • Aina S.
    Verified Buyer
    Hyaluronic Acid Serum - 30ml
    Reviewing
    Hyaluronic Acid Serum - 30ml
    I recommend this product
    Age Range 18 - 24
    Skin Type Combination
    Skin Concerns Breakouts, Hyperpigmentation, Plumping, Acne Scars
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    20 hours ago
    Love this product

    This serum is great! I put it under my makeup and it makes me glow! Also in the winter I use it before my moisturizer and I feel like my skin stays a lot more hydrated. The texture feels very nice. I’ll keep repurchasing!

Reviews LoadedReviews Added