Finding the perfect solution for thinning hair or slow hair growth can feel overwhelming, with countless products on the market claiming to work wonders.
Natural hair growth serums offer a safer, chemical-free alternative, packed with botanicals, vitamins, and essential oils that nourish your scalp and strengthen follicles.
In this guide, we’ve ranked and reviewed 14 of the best natural hair growth serums available in the UK, helping you choose the most effective formulas to support thicker, healthier, and fuller hair.
Table of content
What is a Natural Hair Growth Serum?
A natural hair growth serum is a blend of plant-based extracts and essential oils designed to stimulate hair follicles and promote healthy hair growth.
Unlike synthetic alternatives, these serums aim to nourish the scalp without harsh chemicals, making them a gentle option for daily use.
Many natural serums contain ingredients like peppermint oil, which can increase circulation to the scalp, or rosemary oil, known for its ability to enhance hair thickness. Some serums also include butylene glycol as a humectant or stabiliser, and vitamins such as vitamin E or B5, which are essential nutrients for hair health.
These serums can help address dryness, frizz, and improve the condition of dry or damaged hair by restoring moisture and strengthening strands. Regular use can enhance hair texture, making hair feel softer and smoother.
The idea is to create an environment that supports hair health from the roots up. When using a natural hair growth serum, consistency is key.
It’s not a magic potion that works overnight, but with regular application, you might start to see your hair feeling thicker and looking more vibrant.
Remember, it’s about giving your hair the nutrients it needs while keeping things light and simple.
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Best Natural Hair Growth Serums in the UK
🔹 Best Overall: Bio-Pilixin Serum: A powerful, science-backed formula that promotes natural hair growth, supports follicle health, and reduces early thinning. Key ingredients like fo-ti and mung bean help protect the scalp, promote hair growth, and enhance vitality. Users often notice the appearance of baby hairs as a sign of new growth, and the serum can also help with less hair shedding and improve overall hair wellness.
🔹 Best for Hair Thickness: Nutrafol Hair Serum – Clinically proven to increase hair density and improve scalp health, this serum addresses early thinning and less hair concerns. It contains fo-ti and mung bean to strengthen follicles and promote hair wellness. The formula also helps soothe itchy scalp and reduce dandruff, supporting a proactive approach to hair care.
🔹 Best Luxury Option: Kérastase Scalp & Hair Serum – A premium serum that nourishes the scalp, strengthens hair from the roots, and helps protect against damage. It supports follicle health, promotes hair growth, and enhances vitality for fuller, healthier hair.
🔹 Best Budget-Friendly: The Ordinary Multi-Peptide Serum for Hair Density – An affordable, multi-peptide serum designed to boost hair thickness and support follicle health. The price makes it a great value for those seeking effective results without overspending. It helps with early thinning, less hair, and can be part of a proactive approach to hair wellness.
🔹 Best Plant-Based Formula: Vegamour Gro Revitalizing Hair Serum – A vegan, botanical serum that encourages healthy, fuller hair growth and supports scalp health. It contains mung bean to strengthen hair and fo-ti for improved follicle health, while also helping to reduce dandruff and soothe itchy scalp.
🔹 Best for Fine Hair: Briogeo Destined for Density Megastrength+ Peptide Density Serum – A lightweight serum that targets fine or thinning hair, supports follicle health, and helps promote hair growth. It also helps protect hair from environmental stressors and enhances overall vitality.
🔹 Best Fast-Absorbing Serum: Viviscal Hair Thickening Serum – Quickly absorbs into the scalp to fortify and thicken hair strands, addressing early thinning and less hair. It supports hair wellness and can help soothe itchy scalp.
🔹 Best for Scalp Hydration: Divi Scalp Serum – A nourishing serum that hydrates and revitalises the scalp for better hair growth, helps reduce dandruff, and supports follicle health for overall hair vitality.
🔹 Best Lightweight Oil: Pattern Argan Oil Hair Serum – A lightweight, natural oil blend that strengthens and protects hair, supports follicle health, and helps maintain hair wellness.
🔹 Best for Scalp Density: Living Proof Scalp Care Density Serum – Formulated to increase scalp coverage, improve hair density, and support follicle health. It helps with early thinning and less hair, and can be part of a proactive approach to hair care.
🔹 Best Botanical Blend: Rene Furterer Hair Serum – Enriched with plant extracts, including fo-ti and mung bean, to boost circulation, stimulate hair follicles, and promote hair growth. It also helps protect the scalp and enhance vitality.
🔹 Best Cold-Processed Serum: Act+Acre Cold Processed Stem Cell Scalp Serum – Uses cold-processing technology to deliver nutrients directly to the scalp, supporting follicle health, hair wellness, and helping with early thinning.
🔹 Best for Scalp Health: The Nue Co. Supa Thick Scalp Serum – Strengthens the scalp’s barrier, supports healthier hair growth, and helps reduce dandruff and soothe itchy scalp. It promotes follicle health and overall hair vitality.
🔹 Best Ayurvedic Formula: Ranavat Mighty Majesty Fortifying Hair Serum – A luxurious, Ayurvedic-inspired serum that fortifies and nourishes hair, supports follicle health, and helps protect hair from damage.
1. Bio-Pilixin Serum
Developed through advanced stem cell technology, Bio-Pilixin® Serum is designed to combat hair thinning, including early thinning, and encourage new growth while supporting follicle health.
It enhances blood flow and delivers vital nutrients to your scalp, showing results in as little as 45 days. Using this serum is part of a proactive approach to hair care, helping to address thinning before it progresses.
This serum is drug-free and safe for daily use, with a 93% satisfaction rate among users in clinical studies. It is formulated to promote hair growth and support overall scalp wellness.
Whether you’re dealing with early signs of hair loss or just want to maintain your mane, Bio-Pilixin could be your new go-to.
2. Nutrafol Hair Serum
Nutrafol Hair Serum nourishes follicles with ashwagandha exosomes and vitamins, reducing scalp inflammation and boosting cellular renewal for thicker, stronger hair.
Its lightweight, non-greasy texture absorbs quickly, supporting hair wellness from the roots and minimising breakage in thinning areas.
Clinical insights show improved density after 90 days, ideal for stress-related shedding or fine hair. Users praise its clean, vegan formula for enhancing scalp health without residue, promoting fuller locks with consistent use.
3. Kérastase Scalp & Hair Serum
Kérastase Initialiste Scalp & Hair Serum, free of minoxidil, uses SP94, ceramides, and green tea to shield against environmental damage while boosting vitality and density in sparse spots.
Visible results emerge in six weeks, with smoother, resilient hair for fine types, no heavy buildup. Testers note reduced breakage and added shine, thanks to its antioxidant protection and gentle hydration.
Perfect for daily use on colour-treated hair, it strengthens fibres without greasiness.
4. The Ordinary Multi-Peptide Serum
The Ordinary Multi-Peptide Serum for Hair Density leverages peptides, caffeine, and green tea to enhance scalp circulation and root nutrition, yielding fuller hair and less shedding.
Its humectant base with butylene glycol maintains moisture, supporting a scientific approach to thinning.
Users report noticeable growth after eight weeks, with testers seeing 2.3 cm monthly growth—above average. Affordable and lightweight, it’s suited for all types seeking denser, healthier strands.
5. Vegamour Gro Revitalizing Hair Serum
Vegamour Gro Revitalizing Hair Serum combines turmeric, caffeine, and mung bean to visibly boost density and nourish the scalp, silicone-free for eco-conscious routines.
Clinical studies show up to 90% reduced shedding and 56% increased density after 120 days, with testers noting longer, stronger hair.
Its water-like consistency absorbs fast, ideal for wavy or curly hair prone to fallout.
6. Briogeo Destined for Density Megastrength+ Peptide Density Serum
Briogeo’s Destined for Density Serum packs peptides for denser, fuller hair, with a jelly texture that applies easily without greasiness, perfect for fine strands.
It reduces frizz, improves texture, and spurs baby hairs along the hairline, with 95% of users seeing less shedding after 16 weeks.
Testers hail its clean formula for smoother, manageable curls and overall scalp comfort.
7. Viviscal Hair Thickening Serum
Viviscal Hair Thickening Serum delivers instant volume with a silky, residue-free formula enriched in vitamins, biotin, and keratin for resilient, textured hair.
It coats strands for multi-dimensional density without frizz, with marine collagen enhancing softness and shine.
Users love its lightweight feel on fine hair, noting lush fullness after daily use.
8. Divi Scalp Serum
Divi Scalp Serum blends copper peptides, caffeine, and rosemary oil to foster growth, with hyaluronic acid hydrating dry scalps and easing itch or dandruff.
Clinical trials reveal 90% fuller-looking hair after 12 weeks, reducing oil buildup for healthier follicles.
Its cooling, non-greasy dropper suits tight styles or sensitive scalps, promoting resilient strands.
9. Pattern Argan Oil Hair Serum
Pattern Argan Oil Hair Serum hydrates dense, curly textures with argan, castor, and shea oils, softening without heaviness for frizz-free, breakage-resistant curls.
It shields from stressors, enhancing moisture and shine for damaged hair, with users noting smoother coils after consistent use. Ideal for 3a-4c patterns seeking elastic, vibrant locks.
10. Living Proof Scalp Care Density Serum
Living Proof Scalp Care Density Serum combats ageing signs like thinning and greys with amino acids, amaranth peptides, and pea sprout extract for fuller scalps.
It boosts density and reduces shedding by 70% in 90 days, with 100% thicker hair in trials. Lightweight and non-greasy, it revitalises follicles for youthful volume on all types.
11. Rene Furterer Hair Serum
Rene Furterer Hair Serum invigorates with plant-based lemon oil and fo-ti, enhancing vitality and circulation in convenient weekly vials.
It thickens sparse areas, reducing fallout when paired with massage, with users seeing denser growth after months. Gentle for sensitive scalps, it promotes shine and strength effortlessly.
12. Act+Acre Cold Processed Stem Cell Scalp Serum
Act+Acre Cold Processed Stem Cell Scalp Serum uses apple stem cells, aloe, and bamboo to nourish the barrier, preventing thinning proactively.
91% report nourished scalps and 89% healthier hair after use, with reduced itch and fallout. Its weightless absorption suits early shedding, fostering thicker growth.
13. The Nue Co. Supa Thick Scalp Serum
The Nue Co. Supa Thick Scalp Serum penetrates deeply using patented follicle technology to target the root causes of thinning hair.
Enriched with prebiotics and probiotics, it helps balance the scalp’s microbiome, which plays a vital role in reducing excess shedding and improving overall scalp health.
Clinically formulated to nourish hair follicles and stimulate growth, this serum is ideal for those seeking stronger, thicker, and healthier hair.
With consistent use, many users report visibly fuller, more voluminous strands, complemented by the calming rosemary aroma that turns every application into a soothing self-care ritual.
14. Ranavat Mighty Majesty Fortifying Hair Serum
The Ranavat Mighty Majesty Fortifying Hair Serum brings the ancient Indian tradition of hair oiling into modern hair care.
This luxurious pre-shampoo treatment blends sunflower seed oil, jasmine oil, and amla extract—an Ayurvedic powerhouse rich in antioxidants—to deeply nourish and fortify the hair.
The formula enhances shine, strengthens strands, minimises shedding, and promotes healthy hair growth. It also helps shield hair from damage and environmental stressors, improving overall vitality and resilience.
Perfect for those seeking a touch of indulgence, this serum leaves hair feeling silky, glossy, and noticeably healthier after each use.
Does Hair Growth Serum Work for Hair Loss?
Yes, hair growth serums can be effective for hair loss, particularly when they contain ingredients that support scalp health and enhance hair follicle function.
Many serums include active ingredients like Minoxidil, which is proven to stimulate hair regrowth, or natural alternatives such as biotin and plant extracts that improve hair density and reduce thinning.
The effectiveness of these serums depends on consistent use and selecting a product suited to your specific hair loss condition. While they tend to be more effective for mild to moderate thinning, results can vary.
For optimal results, it’s recommended to consult a dermatologist, such as those at clinics in Harley Street, London, to tailor treatment to your individual needs. There are also other options for hair loss treatment, such as alternative serums or therapies, which may be considered depending on your situation.
What to Know About Hair Growth Serums
When considering hair growth serums, it’s crucial to know their components, effectiveness, and proper usage to ensure you’re choosing the best option for your hair needs.
Many UK consumers look for products that are free from parabens and alcohol, as these ingredients can be a concern for those seeking clean, non-toxic hair care. Here’s what you should keep in mind.
Consultation with a Specialist
Before you jump into using any hair growth serum, it’s wise to talk to a specialist. A dermatologist or trichologist, such as those at clinics in Harley Street or Manchester, can help you understand the root cause of your hair loss and recommend a serum with the right ingredients for your condition.
This personalised approach helps ensure that you’re not just trying random products but are making informed choices that increase your chances of seeing real results.
Key Ingredients
One popular ingredient in many hair growth serums is minoxidil, known for its effectiveness in hair regrowth. However, it’s not suitable for everyone as it can cause side effects like eczema or scalp irritation.
For those looking for a natural route, ingredients like saw palmetto, pumpkin seed oil, and scalp health oils like rosemary or tea tree oil might be better alternatives.
Many natural serums also include butylene glycol as a common humectant or stabiliser to help maintain moisture and consistency. Herbal ingredients such as fo-ti and mung bean are often found in these formulations, supporting scalp health, promoting hair pigmentation, and improving hair thickness.
Vitamins like vitamin E and pro-vitamin B5 play a crucial role in nourishing and strengthening hair, supporting healthy growth and enhancing scalp health.
These components help nourish the scalp and can prevent hair loss without the harsh side effects of stronger chemicals.
Application Type and Frequency
Choosing the right form of serum—oil or foam—can also make a significant difference. If you have fine hair, a foam-based serum, like those available at Boots, might be preferable as it’s lighter and less likely to leave your hair feeling greasy.
Meanwhile, oils might be better suited for those with coarser hair textures. The frequency of application is important too; some serums are designed for daily use, while others, like those from Superdrug, may only need to be applied a few times a week.
Stick with a routine that fits easily into your lifestyle for the best results.
Growth Effectiveness
Remember, the effectiveness of hair growth serums can vary widely. Factors such as the underlying cause of your hair loss and how diligently you follow the application routine play a huge role.
Taking a proactive approach to hair wellness is especially important for those noticing early thinning or less hair. Addressing these concerns early with targeted serums and routines can help support scalp and follicle health, potentially slowing progression and promoting overall hair vitality.
Generally, these serums work better for mild to moderate thinning. If you have more severe hair loss, these serums might help maintain your current hair condition but are unlikely to reverse the situation completely. Always set realistic expectations and monitor your progress.
FAQs
Which natural ingredients boost hair growth the most?
Natural ingredients such as biotin, caffeine, saw palmetto, rosemary oil, castor oil, and ginseng are known to strengthen hair follicles, improve blood circulation to the scalp, and nourish roots. These compounds support healthier, thicker hair growth without harsh chemicals or synthetic additives.
How does a plant-based serum stimulate hair follicles?
A plant-based hair serum works by delivering essential nutrients directly to the scalp, enhancing circulation, and activating dormant hair follicles. This micro-nourishment strengthens the roots, promotes new growth, and improves overall hair density over consistent use.
When will I see thicker or fuller hair with a natural serum?
Visible results usually appear after 8–12 weeks of regular use, although timing varies depending on hair type, growth cycle, and scalp condition. Consistent application and patience are essential, as natural serums work gradually to restore strength and thickness to hair strands.
Is a botanical serum safe for all hair types, including treated hair?
Yes, most botanical hair serums are gentle and safe for all hair types, including colour-treated, chemically processed, or sensitive hair. They avoid harsh sulphates, parabens, and synthetic ingredients, making them suitable for daily use without damaging the scalp or hair structure.
How often should a herbal growth serum be applied?
For best results, apply a herbal hair serum 2–3 times per week, massaging it gently into the scalp to stimulate blood flow and absorption. Following a consistent routine ensures the follicles receive continuous nourishment for stronger, healthier hair growth.
Can a nutrient-rich serum be used with minoxidil or microneedling?
Yes, many natural serums are safe to use alongside minoxidil or dermarolling treatments. They can enhance absorption and follicle stimulation, but it’s recommended to consult a dermatologist or hair specialist, such as those in London or Birmingham, to avoid irritation or over-stimulation.
Are there side effects or sensitivities from an all-natural growth serum?
Side effects are rare but may include mild redness, itching, or irritation, especially in those with sensitive skin. Conducting a patch test before full application is recommended to ensure the serum is well-tolerated.
Will hair density remain after stopping a plant-based serum?
While some benefits may last, continued use is typically needed to maintain optimal density. Hair strengthened during treatment may remain healthier than untreated hair, but gradual thinning can occur if the serum is discontinued for long periods.
What makes a herbal growth serum more effective than regular hair products?
Herbal serums deliver concentrated nutrients directly to the scalp and follicles, targeting the root cause of hair thinning. Unlike standard shampoos or conditioners that mainly improve surface appearance, these serums nourish, strengthen, and reactivate follicles for lasting hair growth.
Can a natural hair serum help with dry hair and boost hair density?
Yes, a natural hair serum can be applied to wet or dry hair to address dryness and stimulate hair growth. These serums hydrate the scalp, strengthen follicles, and promote new hair growth, improving density and overall hair health with consistent use.
Sources
- Bin Rubaian NF, Alzamami HF, Amir BA, et al. (2024). An overview of commonly used natural alternatives for the treatment of androgenetic alopecia, with special emphasis on rosemary oil. Clin Cosmet Investig Dermatol, 17:2495–2503. doi:10.2147/CCID.S470989 Read the study
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Majeed M, Majeed S, Nagabhushanam K, et al. (2020). Clinical study to evaluate the efficacy and safety of a hair serum product in healthy adult male and female volunteers with hair fall. Clin Cosmet Investig Dermatol, 13:691–700. doi:10.2147/CCID.S271013
Read the study -
Budzianowska A, Banaś K, Budzianowski J, et al. (2025). Antioxidants to defend healthy and youthful skin—Current trends and future directions in cosmetology. Appl Sci, 15(5):2571. doi:10.3390/app15052571
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