10 Best Hair Loss Serum in The UK

Last updated on 02/08/2025

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Nioxin Professional Anti-Hair Loss Leave-On Scalp Treatment - Hair Growth Serum for Thinning Hair with Caffeine & Niacinamide (70ml)

15% OffFree Shipping

Why We Love It

Visible results within 8 weeks.
Enhanced hair density and resistance.
Free from harsh chemicals.

Main Highlights

HAIR LOSS SERUM: Leave-in serum for thicker, fuller hair & reduced breakage - visible results within 8 weeks*
VOLUMISING HAIR PRODUCTS: With SANDALORE, caffeine, lauric acid & niacinamide for the ultimate anti-hair loss serum
PROFESSIONAL HAIR CARE: Enjoy better hair resistance, improved density & reduced hair fall - 93% of users noticed less hair on their brush
HOW TO USE: Apply 12-15 pumps on dry or damp hair daily, massaging evenly across scalp - free from parabens, sulfates & colourants
NIOXIN ROUTINE: For best results, use complete 3-Part System Kit & Night Density Rescue scalp treatment - ideal for self care or as a beauty gift

Kérastase Genesis Hair Serum, Nourishing & Fortifying Leave-In Conditioner, For Weakened Hair, With Ginger Root & Edelweiss Flower, Sérum Anti-Chute Fortifiant, 90 ml

29% Off

Why We Love It

Combats hair loss effectively.
Revitalises hair from root.
Activates healthy hair growth.

Main Highlights

Sérum Fortifiant is a daily treatment to combat hair loss in thinning and fragile hair. Enriched with Aminexil, Ginger Root, and Caffeine; it revitalises the hair from within the root, calms and reduces scalp irritation, and slows hair loss
Strengthening hair fibre from the root to tip, the serum activates microcirculation of nutrients to stimulate healthy hair growth
30 day treatment plan: Apply treatment once per day for 30 days, in the morning or evening. Distribute 4 pipettes to the scalp, gently massage, then style as usual. Do not rinse. To optimise your anti-hair loss routine, combine your treatment with 10 day Cure Fortifiantes Anti-Fall treatment plan

Nioxin Sandalore Anti Hair Loss Treatment Serum, 70 ml

Why We Love It

Promotes healthier, thicker hair growth.
Efficacious for both genders.
Offers complementary specialty hair products.

Main Highlights

Anti-hair loss serum. A leave-on hair treatment to thicken the hair and reduce hair loss
Clinically proven to reduce hair loss by 20 Percent on average in only 8 weeks via improved hair anchorage
The transparent liquid spray improves anchorage of the roots to the scalp
Visible thicker and stronger hair from the 1st application
Unit count: 70.0
Item display volume: 150.0 milliliters

Watermans Grow More Elixir: Hair Growth Serum, Leave-In Scalp Treatment for Hair Loss & Thickening Hair. Boost Growth for Both Women & Men

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Why We Love It

Boosts hair density naturally.
Enhances scalp blood flow.
Stimulates Hair Follicles effectively.

Main Highlights

HAIR LOSS TREATMENT FOR WOMEN & MEN: Formulated with a powerful blend of Biotin, Rosemary Extract, Lupine protein and Niacinamide, Watermans Grow More Elixir helps combat hair thinning and loss due to breakage and other aging factors, supporting natural, healthy hair growth.
BACKED BY SCIENCE & EXPERTS: Developed with cutting-edge research and approved by trichologists, this elixir is part of Watermans’ award-winning range, designed to deliver proven results for fuller, thicker hair.
LONG-LASTING NOURISHMENT: The advanced leave-in formula penetrates deep into the scalp, creating a nutrient-rich environment that revitalizes hair follicles and sustains hair growth for up to 24 hours.
SIMPLE & EFFECTIVE DAILY ROUTINE: Apply Watermans Grow More Elixir directly to your scalp each day at night for a no-fuss solution. Massage gently into problem areas and let the potent ingredients work their magic. No rinsing is required.
UNISEX FORMULATION FOR ALL HAIR TYPES: Suitable for both men and women, this versatile serum is free from sulfates, parabens, and cruelty, making it an ethical choice for anyone looking to enhance their hair care regimen.
PROMOTES FULLER EYEBROWS: Achieve thicker, more defined eyebrows by applying Watermans Grow More Elixir with a cotton bud or small makeup brush. Simply apply the serum to your eyebrows daily, avoiding contact with the eyes, to encourage natural growth and fill in sparse areas.
BEARD HEALTH: Watermans Grow More Elixir not only combats hair thinning but is also an excellent solution for filling in patchy beards, promoting fuller, healthier facial hair growth.

Hair Growth Oil 100% Natural Hair Oil with Caffeine, Biotin, Castor Oil, Argan Oil, Coconut Oil, and Rosemary Oil Effective Thickening Mask & Hair Loss Treatment

30% OffFree Shipping

Why We Love It

Promotes natural, faster hair growth.
Ensures fuller, thicker hair.
Prevents hair breakage effectively.

Main Highlights

100% NATURAL HAIR GROWTH - Every ingredient in this treatment is carefully selected to stimulate blood flow to support and help speed up hair growth.
FULLER THICKER HAIR - Thrive Hair Oil is packed with fatty acids and antioxidants so your scalp is well looked after leading to healthier and thicker hair.
EFFECTIVE TREATMENT - Using Thrive Hair Oil as an overnight mask offers hydration, stimulation and nourishment. Allowing the energising oils to penetrate the scalp encourages new hair growth.
REDUCES HAIR LOSS & TRIGGERS NEW HAIR GROWTH - Rosemary oil is a well known DHT blocker which, helps reduce hair loss . Castor Oil, Baobab Oil, Coconut Oil all strengthen the scalp, preventing hair from follicle damage.
REGENERATING PROPERTIES - Rich in vitamins Argan Oil, Avocado Oil and Almond Oil all help to restore your hair's moisture and lock in proteins preventing hair breakage.

Hair Growth Serum: Rosemary Batana Castor Oil Rice Water Biotin Hair Oils for Hair Growths - Hair Growth Thickening Product - Hair Loss Treatments for Women Men (50 ml (Pack of 1))

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Why We Love It

Stimulates faster hair growth.
Natural and safe for scalp.
Repairs and restores hair health.

Main Highlights

Hair Growth Serum: Our Hair Growth Serum is enriched with Rosemary Oil, Batana Oil, Biotin, Castor Oil, and Rice Water. This powerful blend stimulates hair follicles, promotes faster growth, and helps combat thinning hair for both men and women.
Natural & Safe Ingredients: Our Hair Growth Oil is enriched with a plant-based formula that is gentle on the scalp, free from harsh chemicals, and sustainably crafted to deliver safe and effective results for healthier, thicker hair.
Strengthens & Thickens Hair: Our Hair Oils for Hair Growth is packed with many nourishing ingredients, which work to strengthen each strand from root to tip, reduce breakage, and improve overall hair density. Achieve fuller, more voluminous hair naturally.
Repairs Damaged Hair: Our Hair Treatment Oil repairs dry and brittle hair, restoring its natural softness and radiant shine. Perfect for those with damaged hair caused by styling, heat exposure, or environmental stress.
Convenient Spray Application: Our Hair Growth Oil Spray features an easy-to-use spray applicator that ensures precise and even distribution directly onto your scalp. The lightweight mist absorbs quickly without leaving any residue, making it perfect for daily use.

The INKEY List 1% Caffeine Stimulating Scalp Hair Loss Reduction Serum Overnight Treatment 150ml

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Why We Love It

Stimulates hair follicle growth.
Reduces and prevents hair loss.
Suitable for all hair.

Main Highlights

HAIR GROWTH SERUM - An overnight scalp treatment that uses caffeine powder and a new ingredient called Redensyl to help reduce and prevent hair loss by stimulating hair follicles, therefore encouraging hair growth and helping to improve hair thickness
POWERFUL INGREDIENTS - 1 percent Caffeine powder helps to stimulate the scalp and hair follicles whilst 1 percent REDENSYL helps to improve hair growth while reducing hair loss; 1 percent Betaine helps to condition hair, leaving it soft and healthy; Redensyl is a trademark of Givaudan and is used with permission
FOR ALL HAIR TYPES - Formulated so it's suitable for all hair types including coloured hair, it is cruelty-free and fragrance-free
HOW TO USE - We recommend shaking the bottle before use; Use as an overnight treatment; Shake into the palm of your hand, massage hands together, use your fingertips to rub into the scalp and leave on overnight; Apply enough to cover the entire scalp; Wash hair as normal in the morning, if desired; Use every night for best results over a 3-month period

Boosts hair density quickly.
Reduces breakage and loss.
Lightweight and non-greasy.

Main Highlights

97% OBSERVED Hair Density IN 45 DAYS*: This clinical formulation is made with a blend of 4 dermatologically approved hair growth actives: Redensyl, Anagain, Baicapil & Capilia Longa along with 3 natural hair growth ingredients: Rosemary, Biotin & Rice extract. It boosts hair density and regenerates new hair by restarting the hair growth cycle. *Based on consumer feedback after 90 days of product usage
UP TO 89% HAIR LOSS REDUCTION**: Powered with 3% Baicapil, 1% Capilia Longa & Rosemary. This serum reduces breakage & hair loss by enhancing the keratin composition in hair which helps to strengthen hair and improve hair elasticity. **Based on in vivo study conducted by the proprietary owner of Capilia Longa for 150 days, individual results may vary
CLINICAL HAIR GROWTH ACTIVES: This potent formula is meticulously developed through numerous refinements to stimulate hair growth, featuring a combination of 3% Redensyl, 4% Anagain, 3% Baicapil, and 1% Capilia Longa. This unique blend enhances hair growth by extending the duration of the anagen phase.
NATURAL HAIR GROWTH INGREDIENTS: Blended with the clinical formulation are 3 natural hair growth ingredients: Rosemary, Biotin & Rice extract that strengthen weak hair, prevents breakage and reduces dryness thereby ensuring healthy hair growth.
NON GREASY & EASY TO ABSORB: Unlike other hair growth serums which are sticky in texture and lead to greasy hair over time, this serum is lightweight, non greasy and absorbs easily without making hair greasy hence can be applied anytime without the fear of stepping out.

Nioxin System 3 Scalp + Hair Thickening Treatment - Hair Loss Serum for Coloured, Dry and Damaged Hair with Light Thinning - with Niacinamide and Biotin, 100ml

40% OffFree Shipping

Why We Love It

Visible results within 30 days.
Adds thickness and fullness.
Hydrates and invigorates scalp.

Main Highlights

HAIR LOSS SERUM: Leave-in serum for thicker, fuller hair & reduced breakage - visible results within 30 days
THICKER HAIR: Clinically proven to add thickness & fullness to hair with sun protectant ingredients to defend against UV light damage
SCALP TREATMENT: Provides hydration for hair & scalp from root to tip - refreshing & invigorating, stimulating the scalp
HOW TO USE: Apply to scalp & work through hair from roots to ends - clinically & dermatologically tested
NIOXIN ROUTINE: For best results, use complete 3-Part System Kit & Night Density Rescue scalp treatment - ideal for self care or as a beauty gift

The Ordinary Multi-Peptide Serum for Hair Density, Peptide-Powered Formula for Thicker, Fuller Looking Hair, 60ml

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Why We Love It

Promotes thicker, fuller hair.
Powered by advanced peptide technologies.
Nourishing plant-based ingredients used.

Main Highlights

CONCENTRATED HAIR TREATMENT: A lightweight leave-in serum designed to promote thicker, fuller, and denser-looking hair by supporting the scalp.
PEPTIDE TECHNOLOGIES: Formulated with REDENSYL, Procapil, CAPIXYL, BAICAPIL, AnaGain, and High-Solubility Caffeine to visibly enhance hair vitality and promote a denser appearance.
PLANT-BASED EXTRACTS: Contains natural ingredients such as Larix Europaea Wood Extract, Pisum Sativum Extract, and Camellia Sinensis Leaf Extract to nourish the scalp.
DAILY USE: Apply a few drops to clean, dry scalp once daily, preferably at bedtime, for optimal results.
FREE FROM: Cruelty-free, gluten-free, vegan, alcohol-free, and silicone-free.

8.7

Excellent

We scanned 1071 products

We reviewed these offers relevant to the Hair Loss 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 NIOXIN, KÉRASTASE, WATERMANS, Forest & Shore, Psalmonica, The INKEY List, Bare Anatomy, 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 Hair Loss Serum in the market, we considered we took a deep dive into 5356 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 Nioxin Professional Anti-Hair Loss Leave-On Scalp Treatment - Hair Growth Serum for Thinning Hair with Caffeine & Niacinamide (70ml). We love many things about this product by NIOXIN. What sets it apart from the competition is Visible results within 8 weeks, Enhanced hair density and resistance, Free from harsh chemicals.
The best value product for most shoppers and where user satisfaction is continuously the highest is Kérastase Genesis Hair Serum, Nourishing & Fortifying Leave-In Conditioner, For Weakened Hair, With Ginger Root & Edelweiss Flower, Sérum Anti-Chute Fortifiant, 90 ml by KÉRASTASE based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Hair Loss Serum and the best cost-to-value ratio is Nioxin System 3 Scalp + Hair Thickening Treatment - Hair Loss Serum for Coloured, Dry and Damaged Hair with Light Thinning - with Niacinamide and Biotin, 100mlat NIOXIN with a 40% discount.
Our list of the best Hair Loss 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 Hair Loss Serum in The UK

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We scanned 1071 products

We concluded that: