10 Best Hyaluronic Acid Hair Serum in The UK

Last updated on 12/08/2025

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Kérastase Blond Absolu, Conditioning Leave-In Hair Serum, Overnight Treatment, For Lightened or Highlighted Hair, With Hyaluronic Acid & Edelweiss Flower, Sérum Cicanuit, 90ml

25% Off

Why We Love It

Repairs hair during sleep.
Prevents breakage and friction.
Leaves hair soft, detangled.

Main Highlights

Blond Absolu Serum Cicanuit is an overnight leave-in treatment for highlighted and bleached blonde hair. Enriched with Hyaluronic Acid and Edelweiss Flower, it hydrates and plumps hair fibres from within, reducing breakage and protecting the hair from friction whilst you sleep
Deep overnight repair that leaves no colouring or stains on bedding, For soft, detangled hair when you wake
Apply 2-4 pumps to dry or damp hair, evenly distribute from root to tip. Leave overnight. Use as often as required, depending on the degree of hair damage and fragility

Kérastase Blond Absolu, Fortifying Heat Protecting Serum, For Lightened and Highlighted Hair, With Hyaluronic Acid and Edelweiss Flower, Cicaplasme, 250 ml

25% Off

Why We Love It

Protects from heat, oxidation stressors.
Restores damaged, split ends.
Nourishes for luminous finish.

Main Highlights

Blond Absolu Cicaplasme is a heat-protective leave-in treatment for highlighted or lightened hair. With Hyaluronic Acid, Edelweiss Flower, and UV filters, it restores damaged fibres, smooths the appearance of split ends, and protects the hair from everyday external elements
Protects the hair from heat up to 230 degrees C from styling tools as well as from oxidation and environmental stressors. Deeply nourishes fibres for a smooth and luminous finish
Apply 2-4 pumps to towel-dried, damp hair. Evenly distribute from root to tip, then style, air-dry, or blow-dry. Can also be applied to dry hair for added moisture and shine

Kérastase Blond Absolu 2% Pure Hyaluronic Acid Serum

23% Off

Why We Love It

Deeply hydrates damaged hair surfaces.
Revives and nourishes scalp.
Ensures easy styling post-application.

Main Highlights

The moisturising gel serum has the highest concentration of macro and micro hyaluronic acid to hair surface damage and scalp.
Model Number: Kérastase - Blond Absolu - Haarserum
Apply the serum to towel-dried hair and scalp and gently mage in. Then seal the tips with the Huile Cicaextrême. Finally, style the hair as usual.

FUL Hyaluronic Acid Hair Serum for Dry Damaged Hair – Anti Frizz Leave-In Treatment to Smooth Flyaways & Add Shine – Lightweight Hydrating Serum for Curly, Frizzy, Humidity-Prone Hair

33% OffFree Shipping

Why We Love It

Deeply moisturizes and smooths.
Lightweight, frizz-free formula.
Eco-friendly and vegan.

Main Highlights

Hydration Hero for Frizzy, Dry Hair – Powered by hyaluronic acid, this serum draws moisture into each strand to revive dry, brittle hair with lightweight hydration. 100% of users said their hair felt more moisturised.
Curl-Friendly and Color-Safe Formula – Enhances natural texture and bounce while conditioning curls without heaviness. 95% said flaky, itchy scalp felt revived after use on the scalp.
Frizz Control Meets Salon Shine – Instantly smooths flyaways, blocks humidity, and adds glossy, frizz-free finish. 100% of users saw a reduction in frizz and said hair looked shinier after use.
Leave-In Care That Strengthens and Softens – Use daily to detangle, prevent breakage, and improve manageability. 100% felt hair was intensely nourished after one use.
Salon-Trusted Results from FUL – Developed with FUL's salon expertise, this high-performance serum transforms tired, frizzy strands into shiny, revitalized hair you can feel confident in every day.
Boosts Shine & Enhances Hair Texture – Instantly elevates your hair’s appearance with a healthy, glass-like shine. Ideal for dull, lifeless strands in need of a radiant refresh—without heaviness or residue.
Lightweight, Daily-Friendly Formula – Designed for everyday use on wet or dry hair. Won’t clog follicles or build up over time—just consistent hydration and smoothness in a few quick pumps.

The Inkey List Hyaluronic Acid Hydrating Hair Treatment 100ml, Reduces Frizz, Improves Shine, Fragrance Free, Suitable For All Hair Types

Why We Love It

Boosts hair shine and strength.
Promotes reduction of frizz.
Enhances environmental hair protection.

Main Highlights

DE-FRIZZ & HYDRATE - This lightweight Hyaluronic Acid Hydrating Hair Treatment is formulated with both high and low molecular weight Hyaluronic Acids, helps to hydrate, reduce frizz and brittleness to improve shine. When your hair becomes dry, the hair cuticle is rough and open, causing hair to lose moisture and therefore become frizzy. Reverse environmental impacts such as over washing, high water temperature, heated styling tools and humidity by rehydrating your hair follicles effectively.
POWERFUL INGREDIENTS - Highly innovated 2% Resisthyal containing an optimised and efficient high and low molecular weight Hyaluronic Acids to help hydrate your hair and improve its shine - while also protecting your hair from the natural environment. Also containing 1% Betaine, to condition the hair, leaving it super soft and healthy. An additional 1% Panthenol to aid in hydrating and moisturizing the hair further.
FOR ALL HAIR TYPES - Suitable for all hair types including brittle and thin hair, our Hyaluronic Acid Hydrating Hair Treatment is designed to treat dark circles and puffiness. It is also suitable for Pregnancy and Breastfeeding.
HOW TO USE - Ensure to use as a post wash treatment and shake well before use. Pour the Hyaluronic Acid Hydrating Hair Treatment into the palm of your hand, massage your hands together and work through wet or dry hair. Apply enough to thinly coat all of your hair. Leave on and style as usual.
THE INKEY LIST - We believe products should be accessible to all, but we will never compromise on quality, ensuring only the genuine products reach you; Products allow you to test and play with ingredients to build your skincare recipe, for your ever changing skincare needs

L'Oréal Paris Revitalift Filler Hyaluronic Acid Serum [1.5% Pure Concentrated Micro-Epidermic Hyaluronic Acid], Dropper Serum, Intensely Hydrates & Replumps, Visibly Reduces Fine Lines & Wrinkles

60% OffFree Shipping

Why We Love It

Intensive anti-wrinkle, skin-boosting treatment.
Contains 1.5% pure Hyaluronic Acid.
Environmentally friendly packaging.

Main Highlights

World’s #1 Anti-Ageing Serum* by L'Oréal Paris, Revitalift Hyaluronic Acid Anti-Wrinkle Serum
Serum intensely hydrates and is clinically proven to replump fine lines and wrinkles in just 1 hour**
Formulated with 1.5% Pure Concentrated Micro-Epidermic Hyaluronic Acid, our highest concentration of pure Hyaluronic Acid
The formula contains two types of Hyaluronic Acid for high performance: Macro Hyaluronic Acid molecules which are larger and sit at the top of the skin's surface to boost hydration, and Micro Hyaluronic Acid molecules which are smaller and penetrate deeper into the skin’s epidermis, to boost from within
Serum is suitable for all skincare types and can be used in more morning and evening skincare routines
To lock in plump, pair with Revitalift Hyaluronic Acid Plumping Watercream. The serum is suitable for all skincare types and can be used in more morning and evening skincare routines

L'Oreal Paris Elvive Hydra Hyaluronic Serum, With Hyaluronic Acid for Dry, Dehydrated Hair, Replumping Hydrating Treatment, for All Hair Types, 150ml

50% OffFree Shipping

Why We Love It

Fights hair dehydration effectively.
Offers plumped, shiny hair.
Suitable for all textures.

Main Highlights

Hydra hyaluronic serum helps fight dehydrated hair, hair feels hydrated for up to 72 hours
Hair looks visibly plumped, bouncy and shiny**, boosts and reshapes hair lengths
Use like a daily moisturiser on wet or dry hair, at any time of day. spray throughout your lengths. style as usual.
Non-greasy formula, suitable for all hair textures, no weigh down**
Contents: 1x l’oreal hair serum, by elvive hydra hyaluronic acid spray, anti frizz for dry hair, volume: 150ml

L'Oréal Paris Elvive Hydra Hyaluronic Acid Overnight Hydrating Cream for Dry Hair, 200 ml

50% OffFree Shipping

Why We Love It

Delivers softness and intense hydration.
Promotes lively, bouncy hair.
Ensures manageability with lightness.

Main Highlights

4x more softness and deep hydration
Full of bounce
More manageable
No Weigh Down
Pillow-transfer friendly

The Ordinary Hair Care Natural Moisturizing Factors + HA, Lightweight Hydrating Scalp Serum with Hyaluronic Acid and Squalane, 60ml

30% OffFree Shipping

Why We Love It

Hydrating formula for combination skin.
Luxurious shea butter scent.
Lightweight gel absorbs quickly.

Main Highlights

Natural Moisturizing Factors + HA For Scalp is a light, milky formula designed to support scalp hydration and help ease discomfort caused by dryness. By utilizing a combination of ingredients that mimic natural moisturizing factors, along with hyaluronic acid and squalane that are naturally produced within the skin, this moisturizing serum helps support the scalp’s barrier without sticking to your hair or weighing it down.
MIMICS NATURAL MOISTURE: Formulated with natural moisturizing factors, squalane, and hyaluronic acid to support the scalp's barrier.
NON-GREASY FORMULA: Hydrates the scalp without weighing down hair or leaving it greasy.
DAILY LEAVE-IN TREATMENT: Massage a few drops into a clean, dry scalp once daily, ideally at bedtime.
FREE FROM: Vegan, cruelty-free, silicone-free, alcohol-free, and gluten-free formulation.

The Ordinary Hyaluronic Acid 2% + B5 (with Ceramides), Multi-Depth Hydration Serum for Plumper, Smoother Skin, 30ml

Free Shipping

Why We Love It

Contains Vitamin B5 hydration.
Lightweight and oil-free formula.
Perfect for morning and night.

Main Highlights

INSTANT HYDRATION: Provides immediate, long-lasting hydration for smoother, plumper, and healthier-looking skin.
SUPPORTS SKIN BARRIER: Ceramides lock in moisture and support the skin’s protective barrier.
REDUCES FINE LINES: Minimizes the appearance of fine dry lines and wrinkles while promoting elasticity and skin smoothness.
PRO-VITAMIN B5: Enhances the skin's moisture retention and supports the formation of essential barrier components like ceramides.
5 TYPES OF HYALURONIC ACID: Delivers hydration to multiple layers of the skin, improving moisture retention and skin suppleness.

9.0

Superb

We scanned 449 products

We reviewed these offers relevant to the Hyaluronic Acid Hair Serum within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like KÉRASTASE, FUL, The INKEY List, L'Oreal Paris, The Ordinary, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Hyaluronic Acid Hair Serum in the market, we considered we took a deep dive into 2246 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is Kérastase Blond Absolu, Conditioning Leave-In Hair Serum, Overnight Treatment, For Lightened or Highlighted Hair, With Hyaluronic Acid & Edelweiss Flower, Sérum Cicanuit, 90ml. We love many things about this product by KÉRASTASE. What sets it apart from the competition is Repairs hair during sleep. , Prevents breakage and friction. , Leaves hair soft, detangled.
The best value product for most shoppers and where user satisfaction is continuously the highest is Kérastase Blond Absolu, Fortifying Heat Protecting Serum, For Lightened and Highlighted Hair, With Hyaluronic Acid and Edelweiss Flower, Cicaplasme, 250 ml by KÉRASTASE based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Hyaluronic Acid Hair Serum and the best cost-to-value ratio is L'Oréal Paris Revitalift Filler Hyaluronic Acid Serum [1.5% Pure Concentrated Micro-Epidermic Hyaluronic Acid], Dropper Serum, Intensely Hydrates & Replumps, Visibly Reduces Fine Lines & Wrinklesat L'Oreal Paris with a 60% discount.
Our list of the best Hyaluronic Acid Hair Serum is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best Hyaluronic Acid Hair Serum in The UK

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We scanned 449 products

We concluded that: