BBy Bikram Nath·Researched from UK Amazon listings·Updated 2026-10-17·5 products compared
What are the best hair growth products to buy in the UK?
Our top pick for Hair Growth Products in the UK is the WishCare Hair Growth Serum Concentrate with 3% Redensyl, 4% Anagain, 2% Baicapil, 100ml.
The WishCare Hair Growth Serum Concentrate suits buyers who want a serum that states its ingredient percentages (3% Redensyl, 4% Anagain, 2% Baicapil) and are happy with a nightly, leave-on routine.
Disclosure: As an Amazon Associate I earn from qualifying purchases. This guide contains Amazon affiliate links, and we may earn a commission — at no extra cost to you — but it never changes our rankings.
The WishCare Hair Growth Serum Concentrate is our top pick among hair growth products because its listing states its active percentages (3% Redensyl, 4% Anagain, 2% Baicapil) alongside caffeine, biotin and rice water, a 100ml size with a micro-spray, and nightly use over a 3 month period. For a peptide serum used once daily, The Ordinary Multi-Peptide Serum lists REDENSYL, Procapil, CAPIXYL, BAICAPIL, AnaGain and High-Solubility Caffeine; for a serum formulated for both men and women, there is the L'Oréal Paris Elvive Growth Booster with Aminexil, Niacinamide and Ginger Root Extract.
This guide compares five hair growth serums and oils from WishCare, The Ordinary, L'Oréal Paris, Nature Spell and Botanic Hearth, using what each listing states: key ingredients, format, size, directions for use and free-from claims. Stated sizes run from 60ml (The Ordinary) to 198 ml (Botanic Hearth); the two rosemary oils from Nature Spell and Botanic Hearth suit buyers who prefer an oil to a serum.
Buying guide
What should you look for in Hair Growth Products?
1Key ingredients: WishCare is the only listing here that states ingredient percentages (3% Redensyl, 4% Anagain, 2% Baicapil), with caffeine, biotin, keratin and rice water. The Ordinary lists REDENSYL, Procapil, CAPIXYL, BAICAPIL, AnaGain and High-Solubility Caffeine; L'Oréal Paris lists Aminexil, Niacinamide and Ginger Root Extract; Nature Spell is a pre-diluted rosemary oil and Botanic Hearth a rosemary oil with biotin, jojoba and castor oils.
2Format: WishCare is a leave-on serum with a micro-spray, The Ordinary a leave-in serum applied a few drops at a time, and L'Oréal Paris a non-rinse daily formula with 6ml bottle graduations. The Nature Spell oil comes in a root comb applicator bottle and is washed out with shampoo.
3Directions: WishCare says to use it every night over a 3 month period and leave it overnight; The Ordinary says once daily on a clean, dry scalp, preferably at bedtime; L'Oréal Paris says daily, on wet or dry hair. Nature Spell says to use it as a pre-wash routine or leave it in overnight. The Botanic Hearth listing gives no directions in the features we read.
4Free-from claims: WishCare lists cruelty free, paraben free, vegan, gluten free and fragrance free; The Ordinary cruelty-free, gluten-free, vegan, alcohol-free and silicone-free; Nature Spell colour-safe, cruelty-free and vegan; Botanic Hearth paraben free, sulfate free and cruelty free. The L'Oréal Paris listing makes no free-from claim in the features we read.
5Size: The Ordinary is 60ml, WishCare 100ml, L'Oréal Paris 102ml, Nature Spell 150ml and Botanic Hearth 198 ml.
Our process
How do we choose our picks?
We don’t lab-test products ourselves. Instead we synthesise current Amazon UK listings and published specs into clear, honest recommendations. We earn a commission if you buy through our links, but that never changes which products we rank.
Current UK availability
We check each pick against live Amazon UK catalogue data rather than last year’s model lists. Stock moves fast, so a listing can sell out after we publish.
Published specs
We compare manufacturer specifications so each pick is right for a real budget and use-case.
UK-specific fit
We factor in UK voltage and plug/fitting standards — details that generic global lists miss.
The WishCare Hair Growth Serum Concentrate suits buyers who want a serum that states its ingredient percentages (3% Redensyl, 4% Anagain, 2% Baicapil) and are happy with a nightly, leave-on routine.
Type
Leave-on serum with micro-spray
Key Ingredients
3% Redensyl, 4% Anagain, 2% Baicapil, caffeine, biotin, rice water
Size
100ml
Directions
Spray onto the scalp, massage in and leave overnight; every night over a 3 month period
The Ordinary Multi-Peptide Serum for Hair Density, 60ml
The Ordinary Multi-Peptide Serum suits buyers who want a once-daily, leave-in peptide serum with named actives and vegan, alcohol-free and silicone-free claims.
L'Oréal Paris Elvive Growth Booster Hair Growth Serum, 102ml
The L'Oréal Paris Elvive Growth Booster suits men and women who want a non-rinse daily serum with Aminexil, Niacinamide and Ginger Root Extract and measured 6ml graduations.
Type
Non-rinse daily serum
Key Ingredients
Aminexil, Niacinamide, Ginger Root Extract
Size
102ml
Directions
Daily, on wet or dry hair; 6ml bottle graduations
For
Men and women, all hair types
What we like
+Formulated for both men and women and all hair types, per the listing
+Aminexil, Niacinamide and Ginger Root Extract named
+6ml bottle graduations for measuring each use
+Non-rinse formula that L'Oréal says applies to wet or dry hair without leaving residue
Worth noting
–The listing says it is best used alongside the Elvive Growth Booster Shampoo and Conditioner
–The listing gives no ingredient percentages and makes no free-from claims
£8.50£16.99−50%Amazon.co.uk price as of 17 Oct, 13:00 (London time). Details
Nature Spell Rosemary Oil for Hair Growth with Root Comb Applicator, 150ml
The Nature Spell Rosemary Oil suits buyers who prefer a pre-wash or overnight oil, with a root comb applicator and colour-safe, cruelty-free and vegan claims.
Type
Pre-diluted rosemary oil with root comb applicator
Key Ingredients
Rosemary oil
Size
150ml
Directions
Apply to scalp and roots, use pre-wash or leave in overnight, then wash out with shampoo
Listed As
Colour-safe, cruelty-free, vegan
What we like
+Pre-diluted, so no mixing is required, per the listing
+Built-in root comb applicator for applying oil to the scalp and roots
+Listed as colour-safe, cruelty-free and vegan, for all hair types
Worth noting
–Needs washing out with shampoo, repeating if necessary, per the directions
–The listing does not name any ingredient besides rosemary oil
£9.99Amazon.co.uk price as of 17 Oct, 13:00 (London time). Details
The Botanic Hearth Rosemary Hair Growth Oil suits buyers who want a larger 198 ml rosemary oil with biotin, jojoba and castor oils and paraben-free, sulfate-free claims.
Type
Rosemary hair oil
Key Ingredients
Rosemary oil with biotin, jojoba and castor oils
Size
198 ml
Listed As
Paraben free, sulfate free, cruelty free
What we like
+198 ml, the largest size in this guide
+Rosemary oil with biotin, jojoba and castor oils, per the listing
+Listed as paraben free, sulfate free and cruelty free
Worth noting
–The listing gives no directions for use in the features we read
–The listing gives no ingredient percentages
£12.99Amazon.co.uk price as of 17 Oct, 13:00 (London time). Details
Product prices and availability are accurate as of 17 Oct, 13:00 (London time) and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.
Editor's Note
These listings name their key ingredients and, except Botanic Hearth, give directions for use; the results they describe are the brands' own claims. Only L'Oréal Paris refers to a consumer test, and the listing says that test covered its shampoo, conditioner and serum used together, not the serum alone.
Our Take
WishCare's Hair Growth Serum Concentrate is the default pick: its listing gives ingredient percentages, a 100ml micro-spray bottle and a nightly routine over a 3 month period. Choose The Ordinary Multi-Peptide Serum for a once-daily peptide serum, or the Nature Spell rosemary oil with its root comb applicator if you prefer a pre-wash oil.
Questions & answers
Frequently asked questions
Which hair growth serum states its active ingredient percentages?
The WishCare Hair Growth Serum Concentrate states 3% Redensyl, 4% Anagain and 2% Baicapil, with caffeine, biotin and rice water. The other products in this guide name their ingredients without percentages.
How often should you use a hair growth serum?
The WishCare Hair Growth Serum Concentrate listing says to use it every night over a 3 month period. The Ordinary Multi-Peptide Serum says once daily, preferably at bedtime, and L'Oréal Paris Elvive Growth Booster says daily, on wet or dry hair.
Which hair growth serums are vegan?
The WishCare Hair Growth Serum Concentrate and The Ordinary Multi-Peptide Serum are both listed as vegan and cruelty-free, as is the Nature Spell Rosemary Oil. The Botanic Hearth listing says cruelty free but does not mention vegan in the features we read.
Which hair growth products are made for men and women?
The L'Oréal Paris Elvive Growth Booster Hair Growth Serum is formulated for both men and women, according to its listing. The other listings do not say they are for both men and women, and the Botanic Hearth listing calls its product a hair growth oil for women.
Which hair growth serums contain caffeine?
The WishCare Hair Growth Serum Concentrate lists caffeine, and The Ordinary Multi-Peptide Serum lists High-Solubility Caffeine. The L'Oréal Paris Elvive Growth Booster lists Aminexil, Niacinamide and Ginger Root Extract instead.
How do you apply the Nature Spell rosemary oil?
The Nature Spell Rosemary Oil listing says to fill the root comb applicator, squeeze the oil onto the scalp and roots, work it through the lengths with a brush, then use it as a pre-wash routine or leave it in overnight and wash it out with shampoo.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. UKPicks earns a small commission from qualifying purchases made via links on this page. This does not affect our editorial recommendations or the price you pay.
