Hyaluronic Acid Serum bottle with 2022 Allure award

Close-up of a person's eye with text highlighting product benefits

Key claims from recent clinical study of customers using Hyaluronic Acid Serum

Key stats from recent clinical trial of customers trying hyaluronic acid serum

Before and after of customer using Hyaluronic Acid Serum

Different Hyalurhnic Acid Serum bottle sizes and uses (30ml = 60 uses, 60ml = 120 uses, 100ml = 180 uses)

Model applying Hyaluronic Acid Serum to her face

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Hyaluronic Acid Serum - 30ml

Hyaluronic Acid Serum - 30ml

Name: Hyaluronic Acid Serum - 30ml
Brand: Inkey List
Price: 1000 EUR
Availability: InStock
Rating: 4.7 (2848 reviews)

Instantly hydrates, plumps & firms skin in a lightweight, non-sticky formula - just €10

4.7

Rated 4.7 out of 5 stars

4.7 Stars (2,848 Reviews)

€10,00 / 30ml

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Worth 50 Points

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

How to Use

Use AM and PM. On damp, cleansed skin, apply a pea-sized amount to face and neck. Gently pat in.

Follow with

Treatments → moisturizer.

Finish with SPF in your AM routine.

INKEY Tip

Apply to damp skin to lock in hydration.

Also helps other products absorb better—no pilling here.

Heads up

When adding new products to your skincare routine, we always recommend patch testing. Learn more here.

Storage

Store in a cool, dry place (15–25°C). Keep out of direct sunlight. Avoid eyes. For external use only. Keep out of reach of children.

Key Claims

82%

agreed their skin felt firmer, smoother and more elastic after 4 weeks of use**

86%

agreed the serum is quick absorbing, lightweight & non-tacky**

Clinically proven to deliver instant hydration*
Contributes to improved skin barrier by reducing water loss*

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

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

Ingredients

2% Multi-Molecular Hyaluronic Acid: Hydration powerhouse. This moisture magnet pulls water into the skin and holds it there—helping to keep skin looking plump, smooth, and healthy.
Matrixyl 3000™ Peptide: Targets the look of fine lines and supports firmer-looking skin.

Water (Aqua/Eau), Propanediol, Sodium Hyaluronate, Glycerin, Butylene Glycol, Phenoxyethanol, Ammonium Acryloyldimethyltaurate/Vp Copolymer, Leuconostoc/Radish Root Ferment Filtrate, Hyaluronic Acid, Carbomer, Sodium Lactate, Polysorbate 20, Palmitoyl Tetrapeptide-7, Palmitoyl Tripeptide-1.

FAQs

WHEN TO USE HYALURONIC ACID SERUM Apply morning and evening after cleansing on damp skin.

HOW TO USE HYALURONIC ACID SERUM On cleansed, damp skin, apply 2-3 drops and gently pat in. Apply preferred serums or treatments. Always follow with moisturizer to lock in hydration. Can be used twice daily.

WHY FIRST AFTER CLEANSING? This serum absorbs best on damp skin and creates a hydration barrier for products that follow. It also soothes skin and balances pH.

SHOULD I HYDRATE BEFORE A TONER? Yes, it helps the toner and other products absorb better by working deep beneath the skin’s surface.

CAN IT BE USED WITH OTHER PRODUCTS? Yes, it works with everything (including actives like Retinol & AHAs) and enhances the effectiveness of other products.

CAN YOU USE HYALURONIC ACID WITH VITAMIN C SERUM? Yes! Apply Hyaluronic Acid first on damp skin, wait 30-60 seconds, then apply vitamin C serum. HA actually helps vitamin C absorb better and reduces potential irritation.

DO I NEED A MOISTURIZER? Hydrators (like Hyaluronic Acid) add water to the skin, while moisturizers lock it in. You may need both, depending on your skin type.

WHO IS IT FOR? All skin types, especially dry or dehydrated skin, and mature skin needing a hydration boost.

IS IT AN AHA? No, it hydrates, not exfoliates.

WHAT % OF HYAURONIC ACID IS THERE %? 2% Multi-Molecular Hyaluronic Acid.

WHAT DOES HYALURONIC ACID SERUM DO? Holds 1000x its weight in water, delivering instant and lasting hydration. Clinically proven to plump skin, reduce fine lines, and boost the effectiveness of other skincare products.

WHAT TYPE OF HYALURONIC ACID? Multi-Molecular, targeting different skin layers for better hydration.

WHAT IS THE PH LEVEL? 6.21

HOW LONG TO SEE RESULTS? Around 6 weeks. Consistency matters—don’t overuse.

IS IT VEGAN? Yes, certified by The Vegan Society.

IS IT SAFE FOR PREGNANT/BREASTFEEDING? Yes.

CAN I USE WITH MEDICATION? Consult your doctor to be sure.

No BS Skincare

Skincare can be confusing.

So we cut the BS, and get straight to the point. We simplify the INCI list - commonly known as the ingredients list, that every skincare product has. That’s also where we get our name from. We’re The INKEY List - here to help you get better skin with real knowledge and formulas that deliver. No BS. No hype. Just effective, science-backed skincare that does what it says it will. We show you what your skin needs, not what’s trending. Whether you’re new to skincare or have a solid routine, we’ve always got your back with innovation, education and clinically-proven results.

All at a price that makes sense.

INKEY. No BS, just better skin.

We are B CORP. Our products are formulated with responsibly sourced ingredients, and packaged with 100% recyclable materials. Skin needs love, but so does our planet.

Carbon Net-Zero. All our emissions are offset annually through planet friendly projects with a focus on education.

Approved under the Cruelty Free International Leaping Bunny programme.

100% of our packaging is recyclable. Learn how to recycle your INKEY List products.

Certified by The Vegan Society

This product is;

Dermalogically tested

Clinically tested

Fragrance-free

Gluten-free

Pregnancy & Breastfeeding safe

Awards & Features

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. At only €10, it’s your overpriced serums worst nightmare.

Hydrates & plumps with immediate results
Improve skin firmness by 82% in 4 weeks**
Boost absorption of other products in a lightweight, non-sticky formula

Shipping info

Standard EU Tracked Shipping from €5.95* (2-5 business days*). FREE on orders over €55.
*The following countries are subject to increased Standard Tracked Shipping rates
€5.95 – Czech Republic, Hungary, Lithuania, Poland, Slovakia
€6.95 – Germany, Latvia.
€7.95 – Ireland.
€8.95 – Austria, Belgium, Denmark, Estonia, France, Italy, Luxembourg, Netherland, Slovenia.
€10.95 – Croatia, Finland, Sweden.
€11.95 – Bulgaria, Greece, Romania, Spain.
€13.95 – Portugal.

*Please note the above shipping timelines are estimates and not guaranteed. Sometimes there may be delays – e.g. carrier delays, logistics, bad weather or things out of our control.
We are currently unable to ship to the following EU countries: Åland Islands, Andorra, Albania, Belarus, Bosnia, Cyprus, Faroe Islands, Georgia, Gibraltar, Iceland, Kosovo, Liechtenstein, Malta, Monaco, Montenegro, Norway, North Macedonia, Republic of Moldova, Reunion, Serbia, San Marino, Svalbard & Jan Mayen, Switzerland, Turkey The Canary Islands, Vatican City or Ukraine

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.

Our team can be reached via our contact us page with any further queries you have or email help@theinkeylist.com for any queries on delivery or taxes.

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

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

Keanu
"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
"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
"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
"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
"Your products have helped me become so much more confident and happy in my skin!"

Tatiana

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4.7

Rated 4.7 out of 5 stars

Based on 2,848 reviews

Total 5 star reviews: 2.3k Total 4 star reviews: 415 Total 3 star reviews: 64 Total 2 star reviews: 28 Total 1 star reviews: 42

Reviews Summary

Customers say this serum absorbs quickly into skin without feeling sticky, leaving it soft and hydrated. The lightweight, silky texture applies smoothly and works well as a first step in skincare routines. Many appreciate the affordable price and larger size option. Common feedback highlights how the serum layers easily with other products and delivers noticeable hydration, especially for dry skin. Some mention it pills under makeup or wish for a pump applicator. Overall, users find it effective and reliable for maintaining skin moisture throughout the day.

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2,848 reviews

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Laura G.
Verified Buyer
Reviewing
Supersize Hyaluronic Acid Serum - 100ml
I recommend this product
Age Range 35 - 44
Skin Type Combination
Skin Concerns Fine Lines and Wrinkles, Damaged Skin Barrier, Plumping, Dehydration, Texture
Have you purchased an INKEY List product before? Yes
How long have you used this product for? 3 months +
Sensitive Skin Suitability Suitable for my sensitive skin
Rated 5 out of 5 stars
7 hours ago
Great results
Absorbs nicely, leaves my skin feeling lovely
Was this helpful?
Sarah O.
Verified Buyer
Reviewing
Supersize Hyaluronic Acid Serum - 100ml
I recommend this product
Age Range 45 - 54
Skin Type Dry
Skin Concerns Fine Lines and Wrinkles, Dehydration, Dryness, Hyperpigmentation, Under Eye Circles
Have you purchased an INKEY List product before? Yes
How long have you used this product for? 3 months +
Sensitive Skin Suitability Suitable for my sensitive skin
Rated 5 out of 5 stars
6 days ago
Great 👌
I aways double cleanse my skin and i find this product great for my second cleanse. ☆☆☆☆☆
Was this helpful?
Aisha M.
Verified Buyer
Reviewing
Supersize Hyaluronic Acid Serum 100ml Duo
I recommend this product
Age Range 18 - 24
Skin Type Normal
Skin Concerns Dryness, Redness, Hyperpigmentation, Acne Scars, Blackheads
Have you purchased an INKEY List product before? Yes
How long have you used this product for? 3 months +
Rated 5 out of 5 stars
6 days ago
My mom lives off of this
her holy grail, almost feels like she loves it more than me
Was this helpful?

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Hyaluronic Acid Serum - 30ml

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Hyaluronic Acid Serum - 30ml | The INKEY List

Suitable for:

Targets:

How to Use

Key Claims

Ingredients

FAQs

No BS Skincare

Awards & Features

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

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