13 best eyelash growth serums 2026, reviewed by experts
If there’s one thing I’ve learned after years of testing beauty products, it’s that the best eyelash growth serums deserve far more credit than they get. I used to believe nothing could help my lashes after a decade of lash extensions and false lashes had left them short, frail and sparse. I tried every DIY hack under the sun, from drenching them in castor and rosemary oil to skipping mascara, and the only result I got? Greasy lids.
Still, being a beauty journalist means trying everything, whether it’s the best mascaras, the best hair serums, or the best red light therapy hair growth devices - and that includes lash serums. So, in the name of research, I decided to properly test a few and speak to the experts.
According to Claire Larsen, global master educator at RevitaLash Cosmetics, “Eyelash serums are similar to a hair conditioner: they hydrate the hair with conditioning ingredients for shine and flexibility, to prevent brittleness and breakage, and they strengthen the hair with ingredients rich in vitamins and strengthening peptides.” Suddenly, it made sense – treating your lashes like hair rather than makeup might actually be the secret.
After just three weeks of using a certain eyelash serum, I could barely recognise my own lashes. They looked darker, fuller, and noticeably longer – something I could never achieve before (even after trying alternative remedies like castor oil or rosemary oil).
And I’m not the only one who’s seen real results. Shani Cohen, Glamour’s Beauty Commerce Writer, swears by the UKLASH Complex Peptide Serum: “I used it every night before my wedding and by week five, people were asking if I’d had extensions.” When a lash serum has that effect, you take note.
So, whether you’re looking to educate yourself some more on all the benefits and potential side effects of lash serums, or if you’re already hovering over the ‘add to basket’ button, we're here to help.
Meet the experts:
- Claire Larsen, global master educator at RevitaLash Cosmetics.
- Nima Pourian, founder of UKLASH.
- Lauren Hogsden, brow expert and senior makeup artist at Benefit.
How I Tested & Why You Can Trust Us:
I’ve been testing beauty products professionally for almost six years now, which means I’ve tried pretty much every lash serum to land on a beauty desk - from cult classics like RapidLash to newer formulas from UKLASH. Over that time, I’ve learned one very important thing: every lash serum is different. What works wonders for one person might do nothing for another, which is why I always test a wide mix of formulas - some packed with peptides, others with biotin, panthenol or castor oil - to see what really delivers results.
Each product gets a proper trial run of at least four to six weeks (lashes take time, unfortunately). During testing, I avoid any other lash-enhancing treatments or supplements, so I can see exactly what the serum is doing on its own. I also pay attention to how my eyes react - if something stings, burns or causes redness, it’s immediately ruled out.
Because I’ve spent years speaking with dermatologists, makeup artists and trichologists, I know what to look for in a formula - and what’s just marketing fluff. I also look at price tags too - some of the best results I’ve had come from mid-range serums, not the over £100 options. So when I say a lash serum works, it’s because it genuinely does – not because it looks pretty on my shelf.
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What is the best eyelash serum that actually works?
Total honesty: it's a toss-up between the two. RevitaLash is a brand behind one of the most popular eyelash enhancers on the market – the RevitaLash Advanced Eyelash Serum – largely due to its ability to target hair growth whilst defending against environmental damage. It has an antioxidant-packed green tea and the BioPeptin complex, and has genuinely delivered on results when tested by multiple members of the Glamour team.
Our former Senior Visual Editor, Chelsea Hughes, gave the product a particularly glowing review after testing it over the course of six weeks.
“To sum this product up; I’ve had numerous friends and family physically inspect my lashes to check whether or not I’m lying about them being real," she said. "The improvement is phe-nom-en-al!”
Our runner-up? Glow For It lash serum. It's a vegan, cruelty-free formula (not all lash serums are), which is formulated to give healthier, thicker, fuller, longer lashes. It's enriched with peptides, which work to stimulate the lash follicle for visible results after just a couple of weeks – without irritating the eyes. It also features an ingredient called saw palmetto extract, which helps to lessen sparsity and helps with thicker growth. TikTok, you were right to go wild for it.
Ahead, the best eyelash growth serums for 2026, reviewed by the Glamour team.
- Key ingredients: Biotin Peptide, vitamin B5, Myristoyl Pentapeptide-17 and green tea extract.
- When to apply: For best results, apply in the evening and allow the serum to work overnight.
- Results after use: 85% of testers saw longer, fuller lashes.
Why we love it: Fortified by nutrient-rich ingredients that stimulate keratin growth such as grape seed extract, swertia japonica extract, pentapeptide-17 and vitamin B7, this viral eyelash serum is bound to deliver fuller and longer lashes quickly and effectively. It lengthens and strengthens your lashes at the same time and is even suitable for wearers of both false lashes and eyelash extensions. It's also reasonably affordable when it comes to lash serums, which is always a big plus in our book. One of the best lash conditioners around.
“The UKLash eyelash serum truly deserves all the hype it gets. It doesn't irritate my sensitive skin, and the redness is minimal. It only took me a couple of weeks of use to start noticing improvement, and by week 8, the results were undeniable,” shares Neamh Randall, GLAMOUR's Commerce Photo Editor.
Save when you shop for the best eyelash growth serums with these Sephora discount codes at checkout.
Pros & ConsPros- Visible difference within a couple of weeks
- Lengthens and strengthens your lashes at the same time
Cons- Can cause some redness at first
RapidLash Eyelash Enhancing Serum
- Key ingredients: Hexatein 1 Complex, amino acids, pumpkin seed extract, biotin and panthenol.
- When to apply: Use once a day in the evening and allow to dry before going to sleep.
- Results after use: 86% of testers experienced thicker, stronger and longer-looking lashes.
Why we love it: Proven to improve the appearance of your lashes and boost their natural length as well as volume, this high-quality eyelash enhancing serum is enriched with Hexatein 1 Complex, a high-quality cocktail that combines six high-grade ingredients: peptides, biotin, amino acids, panthenol, soybean oil and pumpkin seed extract. Targeting lashes from every angle as well as helping to shield them from environmental aggressors like dust and pollution, this conditioning formula is ideal for brittle, thin or short lashes that need a little TLC. It's also said to deliver visible results in up to 8 weeks, so be patient, and wait for the compliments to start rolling in.
“I'm always on the lookout for a quality lash serum, and this iteration from RapidLash is definitely one of my favourite formulas. I was first intrigued by its affordable price, but what impressed me most was the boost of length that I noticed after five weeks of use, which worked amazingly alongside my go-to mascaras," says Fiona Ward, GLAMOUR's Former Acting Website Director.
Save when you shop for the best eyelash growth serums with these Sephora discount codes at checkout.
Pros & ConsPros- Easy application
- Delivers visible results in up to 8 weeks
- Shields lashes from environmental aggressors
Cons- Results take quite a while to show
UKLASH Sensitive Eyelash Serum
Key ingredients: Peptides, hyaluronic acid, seven calming plant extracts
When to apply: Once a day on clean lashes – I prefer at night so it can work while I sleep
Results after use: Fuller, healthier-looking lashes with less irritation after a few weeksWhy we love it: If you’ve always wanted to try a lash serum but your eyes flare up at the first sign of one, this gentle take from UKLASH is worth a spot on your shelf. It teams strengthening peptides with hydrating hyaluronic acid to keep lashes soft and nourished, while soothing botanicals calm the delicate skin along your lash line. The slim brush makes it easy to swipe on without drips or mess, and there’s no burning or tingling - just a quick-drying serum that easily slots into your routine.
“No lash serum is going to give you dramatic lashes overnight - most of them take time, and this one is no exception. After about six weeks of nightly use, I could genuinely see a difference - not huge, but definitely noticeable. My lashes looked slightly thicker at the root, and longer - especially when I popped on my favourite mascara. The biggest win for me is how gentle the formula is - especially as I have sensitive skin. The fact I can apply this nightly, and wake up with zero redness in the morning is a total win.” - Shani Cohen, GLAMOUR’s Beauty Commerce Writer.
Pros & ConsPros- Designed specifically for sensitive eyes
- Calming plant extracts help reduce irritation
Cons- Results are gradual
RevitaLash Advanced Eyelash Conditioner
- Key ingredients: BioPeptin Complex, ginseng and Swertia Japonica extracts, saw palmetto, amino acids and vitamin B.
- When to apply: Once a day, but allow to dry completely (2-3 minutes) before applying eye makeup or going to sleep.
- Results after use: 98% of testers reported stronger, healthier-looking lashes.
Why we love it: A gentle yet mighty formula that's developed by physicians and is clinically approved by both ophthalmologists and dermatologists. It contains a biopeptin complex packed with biotin, green tea, peptides and lipids, which work together to help strengthen lashes and stimulate healthy hair growth. Plus, this bestselling lash growth serum is also packed with plenty of natural ingredients, including plant and flower extracts, as well as vitamins and antioxidants. And did we mention it's also hypoallergenic, oil-free, vegan, cruelty-free and suitable for sensitive skin? One swipe along the lash line each evening is all it takes to achieve the lashes of your dreams in a matter of weeks.
“I started to see the difference after 3-4 weeks of use, so much so that everyone around the office started asking whether I was wearing eyelash extensions. I didn't notice any irritation whatsoever, and the results speak for themselves,” says Mayola Fernandes, GLAMOUR's Commerce Writer.
Pros & ConsPros- Easy to apply
- Lashes look longer and thicker
Cons- Expensive
e.l.f. Enhancing Lash & Brow Serum
- Key ingredients: Glycerin, castor oil, panax ginseng root extract and hyaluronic acid.
- When to apply: Apply to your upper and bottom lash line and brow hairs in the morning and evening.
- Results after use: Stronger, longer lashes and thicker brows.
Why we love it: Get ready for friends and family to ask you whether you're wearing falsies or if you've had eyelash extensions done, because this e.l.f. lash serum will deliver longer-looking and fuller, natural eyelashes faster than you can say “antioxidants” – all thanks to its blend of amino acids and vitamins. Vegan and cruelty-free, reviews mention that it works a treat for filling in sparse patches on brows from over-plucking, and also that it dries down perfectly to look like nothing is on. It doesn't shine, pill or flake either. A lash lift and superior brow growth for less than £10? Day. Made.
“As someone who loves most of e.l.f. products, I wasn't initially sold on this serum. However, having used it for over four months now, I can confirm that it's just as (if not more) effective as other premium formulas I've tried. My lashes appeared fuller and darker about four weeks into testing, and the noticeable boost in length came after six weeks of use, which definitely exceeded my expectations,” says Denise Primbet, GLAMOUR's Freelance Beauty Contributor.
Pros & ConsPros- Affordable
- Blend of amino acids and vitamins
- Vegan and cruelty-free
Cons- Can take longer to see results
UKLASH Complex Peptide Lash Growth Serum
Key ingredients: Peptides, hyaluronic acid, vitamin B5.
When to apply: Once daily on clean lashes.
Results after use: Fuller, longer-looking lashes in as little as 8 weeks.Why we love it: This cult-favourite lash serum blends strengthening peptides with hydrating hyaluronic acid and conditioning vitamin B5 to support healthy lash growth from root to tip. The lightweight formula coats each lash evenly, helping to prevent breakage and brittleness while creating the ideal environment for thicker, denser lashes. It’s also prostaglandin-free (the ingredient that can sometimes irritate eyes), making it a gentle yet effective choice for everyday use.
“I have tried more lash serums than I’d like to admit, but UKLash’s Complex Peptide Serum genuinely stood out. I loved how easy it was to swipe on with the fine brush and how quickly it absorbed without any sticky residue. After around six weeks of nightly use, my lashes looked noticeably longer, darker and more defined - even without mascara.The only downside? You really do need to be consistent to get the best results, but if you’re patient, it’s a total game-changer for your lash routine.” - Shani Cohen, GLAMOUR’s Beauty Commerce Writer.
Pros & ConsPros- Peptide-rich formula to strengthen lashes
- Hydrates and conditions with hyaluronic acid and vitamin B5
- Prostaglandin-free
Cons- Requires daily use and a little patience before results sho
- Key ingredients: Glycerin, glycol, green tea leaf extract, clover flower extract, biotin and Wasabia Japonica root ferment extract.
- When to apply: Use every evening on clean, dry lashes.
- Results after use: Longer, more volumised lashes.
Why we love it: This viral eyelash conditioner has been all over #BeautyTok for quite some time now, and for a good reason. Sold exclusively at Beauty Bay, the Glow For It Lash Growth Serum is formulated to lengthen, thicken and strengthen your natural lashes. You can give thanks to its highly effective formulation that's filled to the brim with ingredients such as multi-peptides to stimulate hair growth, biotin to strengthen, panthenol to reduce breakage, and chamomile extract to soothe and reduce inflammation. It also features an ingredient called saw palmetto extract, which helps to lessen sparsity and helps with thicker growth. It's been proven to work in just under 2 weeks, too.
When testing the Glow For It eyelash serum, our Senior Beauty Editor, Elle Turner noted that it didn't result in any discomfort or irritation whatsoever. She noticed results as early as 11 days into the testing process, which is the fastest compared to other serums we've tried.
Pros & ConsPros- Easy to apply
- Fragrance-free
Cons- Some reviewers noticed redness at the start - so it's best to do a patch test
The Ordinary Multi-Peptide Lash and Brow Serum
- Key ingredients: Myristoyl Pentapeptide-17, Biotinoyl Tripeptide-1, Oligopeptide-2, Acetyl Tetrapeptide-3 and caffeine.
- When to apply: Apply a thin layer along the lash line and eyebrows in the morning and evening.
- Results after use: Thicker-looking lashes and brows.
Why we love it: When it comes to affordable yet reliable beauty products, not many do it better than The Ordinary. This water-based eyelash and eyebrow serum is suitable for all skin types and has a lightweight, non-greasy formula that nurtures both the hair and skin. It comes with 11 (yep, 11) different active ingredients, including arginine, four peptide complexes, and a whole set of natural extracts to give your lashes and brows the boost they deserve. Not only that, but it's also brimming with the brand's Sympeptide Xlash technology to nourish, and Widelash technology to promote length and volume.
“I'm a firm believer that quality beauty products shouldn't always come with a premium price tag, and this eyelash serum from The Ordinary is proof. I've been trialling this formula for over 6 weeks now, and I'm already seeing some promising results, having noticed a sizeable improvement to the length of my lashes as well as volume,” shares Fiona Embleton, GLAMOUR's Associate Beauty Director.
Save money on this eyelash serum with these LookFantastic discount codes.
Pros & ConsPros- Lightweight, non-greasy formula
- 11 different active ingredients
- Affordable
Cons- Some reviewers say brush bristles are quite stiff
Grande Cosmetics GrandeLASH-MD Lash Enhancing Serum
- Key ingredients: L-Proline, hyaluronic acid, vitamin E, panthenol, glycerin and aloe barbadensis leaf juice.
- When to apply: Use once a day and allow 1-2 minutes for it to dry.
- Results after use: 94% of testers saw healthier-looking lashes, and 91% saw longer-looking lashes.
Why we love it: Looking to achieve naturally longer and thicker lashes? Say no more. Powered by a blend of amino acids, prostaglandin, peptides and hyaluronic acid, this moisturising eyelash serum will give you what you want and then some. Its ultra-slim, soft applicator makes it easy to target shorter, more fragile lashes, and it's also suitable for people who wear contact lenses and lash extensions. Although it's certainly an investment, the good news is that it's frequently on sale on Amazon for a fraction of the price. Plus, the chic golden tube and the fact it promises visible results in just 4-6 weeks has us sold.
“I've used the GrandeLASH-MD Lash Enhancing Serum for just under 4 weeks, and judging by the impressive results, this might just be one of the most effective eyelash growth serums I've tried. Not to mention, I've started noticing the results after just 2 full weeks of use, which definitely scores extra points in my book," says Sophie Cockett, GLAMOUR's Senior European Commerce Editor.
Pros & ConsPros- Visible results in just 4-6 weeks
- Slim brush makes it easy to target shorter, more fragile lashes
Cons- Contains prostaglandin
- Expensive
Anastasia Beverly Hills Lash Genius Conditioning Lash Serum
- Key ingredients: Biotin, castor oil, peptides, Korean red ginseng.
- When to apply: Once a day.
- Results after use: Fuller and longer-looking lashes.
Why we love it: A conditioning, nourishing formula that envelops lashes in a blend of six rejuvenating ingredients, this multi-benefit serum is designed to create fuller and longer-looking lashes. Drying clear with zero stiffness or stickiness (so you can pop your mascara on afterwards as normal, after the serum's dry), this kind formula is also ophthalmologist tested, vegan, and cruelty-free. It also contains a host of effective ingredients, from Korean red ginseng to make lash hair appear thicker, to softening panthenol and strengthening biotin. There's also a nourishing, protecting element in the form of castor oil, and peptides to shield against breakage.
“Unlike other formulas I've tried, this serum wasn't as runny or heavy, which meant I could easily wear it throughout the day. While the results were a bit less wow-factor compared to other serums, it still did a stellar job at keeping my eyelashes nice and nourished,” says Denise Primbet, GLAMOUR's Freelance Beauty Contributor.
Pros & ConsPros- Vegan and cruelty-free
- Contains Korean red ginseng
- Nourishing
Cons- Expensive
- Not the best results
Benefit Eyes Whoop Lash Enhancing Serum
- Key ingredients: Panthenol, biotin, safflower extract, hibiscus extract, sunflower seed oil and hydrolysed rice protein.
- When to apply: Nightly to clean, dry lashes.
- Results after use: 98% of testers said lashes feel conditioned and 94% said lashes look more volumised.
Why we love it: Looking to support your lashes and prevent any unwanted hair loss? Say no more. This formula from Benefit is fortified with a blend of plant extracts, vitamins, biotin and rice protein, which help to condition your lashes and breathe new life into them. “It enhances the appearance of lashes, making them look healthier and more volumised in as little as six weeks. Gentle and clinically tested, it’s suitable for sensitive eyes, allowing for confident application,” says Lauren Hogsden, makeup artist and brow expert at Benefit.
“I have tried many a lash serum for my stubborn and short lashes, but I always find myself turning back to this one. I like its precise applicator, which is super slim to really target shorter, thinner lashes. Just one dip is all you need to get plenty of formula for both eyes, which I like as it's literally two sweeps and you're done in about 5 seconds. The formula is so silky, too; you could be forgiven for thinking you were applying a high-grade face serum to your lashes. And the shiny, pearlescent pink packaging means I look forward to using it, and never forget a night's use," shares Emma Hobday, Freelance Commerce Writer.
Save when you shop for the best eyelash growth serums with these LookFantastic discount codes at checkout.
Pros & ConsPros- Precise applicator
- Suitable for sensitive eyes
Cons- Some reviewers haven't seen significant results
Key ingredients: Pea Peptide, hyaluronic acid, green tea and cica extracts.
When to apply: Once a day to clean, dry upper lash line.
Results timeline: Use everyday for a minimum of 6 weeks for the best results.Why we love it: A newbie on the market - this lash serum is all about strengthening from the root up rather than giving a quick-fix effect. Peptides help support healthier, denser lashes over time, while hyaluronic acid and soothing botanicals keep them hydrated and less prone to breakage. The texture is lightweight and non-sticky, so it sits comfortably under your usual skincare without any irritation.
The results are slow and steady, but that’s the appeal. With consistent use, lashes can look more even, less brittle and subtly fuller. It’s a great option for anyone who wants a gentle, prostaglandin-free formula that prioritises lash health.
Pros & ConsPros- Peptide blend to support stronger lashes
- Gentle, vegan, prostaglandin-free formula
Cons- Requires patience and daily use to see results
FAQ's
Do eyelash serums really work?
In a nutshell: yes, they help support each hair follicle's growth cycle by conditioning your lashes (similar how nourishing haircare products would encourage healthy regrowth). "Eyelash serums help to grow your natural lashes, making them longer and thicker after continued usage – it is a commitment, but worth it for beautiful, natural lashes," explains Nima Pourian, founder of Uklash.
How do lash growth serums work?
“Eyelash serums absorb into the lash and brow follicles to help stimulate growth, reducing fall out and enhancing the thickness of hair by strengthening roots,” shares Nima.
“They protect the health of the hair with free-radical fighting antioxidants and they enhance the overall beauty of the lashes for healthier lashes,” shares Claire Larsen, global master educator at RevitaLash Cosmetics. "A comprehensive formula will contain a blend of ingredients like conditioners, vitamins, antioxidants and peptides to have a multi-faceted approach to beautifying the lashes and keeping them strong and healthier-looking," she explains.
How long do lash growth serums take to work?
According to Claire, results usually differ depending on the individual, however, the growth is often noticeable after six weeks of regular, daily use. "We conducted an independent consumer study with 63 participants. After six weeks of daily directed use, 98% reported improved lash appearance, 98% reported healthier-looking lashes, and 98% reported stronger lashes."
Meanwhile, Nima shared that the growth also depends on the stage of “your lash growth cycle.” "Our eyelashes and brows go through a cycle of around three months (12 weeks). This includes a growth phase (Anagen), a transition phase (Catagen) and a resting phase (Telogen)," Nima elaborates. “This is why Eyelash & Eyebrow growth serums are advised to be used once per day for 8-12 weeks to achieve best results - the same amount of time as a full growth cycle.”
Do eyelash serums have any side effects?
"Aside from the positive benefits, some users can experience redness or irritation, particularly if they are excessively using," says Larsen.
Similar to many other beauty products with active ingredients, it's always better to tread carefully and do a patch test to observe how your skin reacts to your chosen eyelash serum. “It is very rare that someone would have a reaction, but the eyes can be sensitive so always best to check first," says Pourian. “It is also important to follow instructions correctly and not to overuse the serum.”
You could also look for dedicated options for sensitive eyes, like the Revitalash Advanced Sensitive Eyelash Conditioner, and keep a beady eye for ‘ophthalmologist-developed/tested’.
What happens if you stop using an eyelash growth serum?
According to experts, you shouldn't stop or use your eyelash growth serum on and off, particularly if you're noticing results.
“You may gradually lose the benefits gained during its use. Typically, lashes return to their natural growth cycle, which can decrease their length and volume,” says Lauren Hogsden, makeup artist and brow expert at Benefit.
So, while your lashes may not go back to the same brittle and weak state as before, they might become less prominent – so if you're looking to maintain your results, keep using your eyelash serum. Our top tip? Pop it on your vanity next to your evening skincare, or next to your toothbrush, so you can't not see it.
