Just a friendly note to say the UKLash eyelash serum is 20% off today (2025)

  • Best eyelash growth serum
  • Best lash serum for speed
  • Best lash serum for length
  • Best natural growth serum
  • Best viral lash growth serum
  • Best serum for conditioning
  • Best serum for application
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  • Best lash serum for growth
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  • How do eyelash serums work?
  • How to use an eyelash serum?
  • Eyelash growth serums really can have magical effects. Yes, you can rely on a great volumising mascara, but that will only get you so far. You need an efficacious serum to take your natural hairs from stubby to sky-high.

    Many come with bold claims; they promise towering, fuller lashes within a matter of a few weeks. Some, truthfully, are a fad, but if you find the right formula and are willing to spend more than a fiver, they really can make a huge difference to the length and density of your lashes.

    The UKLash serum has remained a loyal must-have (oh, and fyi, the UKLash hair growth serum is now a thing) and while it may be spenny, I can testify that Revitalash genuinely works. Not to brag, but I could buy a Stanley if I had a pound for every time I've been asked if my lashes are real – and it's all thanks to these clever formulas...

    Top eyelash growth serums

    How do we test lash serums?

    To bring you the very best eyelash growth serums, I've examined ingredients, ease of application and the results of each and every tube. Of course, everyone will have a different growth journey, but the ones that made it into my edit delivered impressive improvements to the length, density and condition of the lashes when used regularly.

    They're also easy to use and apply directly onto the lash line without spilling onto the surrounding skin – and if you're sensitive prone, you'll find this especially important. Price point plays a role too. I'm a big believer that if you want to see results, you have to spend more than a fiver. But, to cover all bases, I've included some budget players that do a damn good job too.

    So, if you're looking to ditch the falsies and are in search of eyebrow-skimming lashes, take a scroll below.

    The best eyelash growth serums our beauty team rely on

    Best eyelash growth serum

    Uklash Eyelash Serum

    Just a friendly note to say the UKLash eyelash serum is 20% off today (11)

    Just a friendly note to say the UKLash eyelash serum is 20% off today (12)

    Pros

    • Just a friendly note to say the UKLash eyelash serum is 20% off today (13)Ophthalmologist, dermatologist and trichologist approved
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (14)Money-back guarantee
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (15)Thin wand for easy application
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (16)Fragrance-free

    Cons

    • Just a friendly note to say the UKLash eyelash serum is 20% off today (17)Can we get a bigger tube, pls?

    UKLash's serum has been a fan-favourite for years, and the incredible before and after transformation pics prove why. Oh, and not to mention it's rarely reduced with 20% off – yes, run to checkout now.

    Its impressive formula is cocktailed with a bunch of high-grade ingredients – like pentapeptide-17 and vitamin B7 – to encourage growth by stimulating keratin (protein) production, which is already present in your lashes.

    Plus, if you aren’t convinced, you can get a 100-day money-back guarantee. It’s a win-win really.

    Key Ingredients

    Vitamin B5Protects and nourishes the hair
    Myristoyl Pentapeptide-17Stimulates keratin, a vital protein needed for lash growth
    Biotin peptideProduces fatty acids, helping the growth and strength of the lashes

    Best lash growth serum for speedy results

    RapidLash Eyelash Enhancing Serum

    Just a friendly note to say the UKLash eyelash serum is 20% off today (18)

    Just a friendly note to say the UKLash eyelash serum is 20% off today (19)

    Pros

    • Just a friendly note to say the UKLash eyelash serum is 20% off today (20)Fragrance-free
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (21)Thin wand makes easy application
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (22)Contains a complex of ingredients, like biotin and peptides, to strengthen and lengthen lashes

    Cons

    • Just a friendly note to say the UKLash eyelash serum is 20% off today (23)Takes consistent use to see a noticeable result

    RapidLash is one of the most affordable and effective eyelash growth serums on the market.

    Apply the clear serum to your upper lash line once or twice a day (morning and night) for eyebrow-skimming lashes. You can also stock up on an eyebrow version (RapidBrow) which is just as effective.

    Key ingredients

    Hexatein 1 ComplexConditions the lashes to encourage growth
    Amino acidsBoost protein production, resulting in longer and stronger lashes
    Pumpkin seed extractHigh in vitamins and minerals to improve the glossy appearance of the lashes

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    Best lash growth serum for length

    RevitaLash Advanced

    Just a friendly note to say the UKLash eyelash serum is 20% off today (24)

    Pros

    • Just a friendly note to say the UKLash eyelash serum is 20% off today (25)Super speedy (and amazing) results
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (26)Easy application thanks to the thin wand
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (27)Comes in multiple tube sizes
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (28)Fragrance-free

    Cons

    • Just a friendly note to say the UKLash eyelash serum is 20% off today (29)£££

    This one needs little introduction: Revitalash was created by an ophthalmologist who wanted to help his wife's confidence after she lost her lashes to cancer.

    It uses a cocktail of peptides (the building blocks of protein) and antioxidant botanicals to stimulate hair growth and density, while protecting your lashes from environmental damage.

    You can also grab the serum in 2ml, 3ml and 3.5ml tubes which is a pretty handy feature.

    Key ingredients

    BioPeptin ComplexA blend of peptides, lipids, green tea and biotin to promote lash growth
    GinsengHelps to grow strong hairs
    Amino AcidsMolecules that combine to create proteins, the build up of hair

    Best natural lash growth serum

    Champo Pitta Lash Serum

    Just a friendly note to say the UKLash eyelash serum is 20% off today (30)

    Pros

    • Just a friendly note to say the UKLash eyelash serum is 20% off today (31)Results are fast, with loyal use
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (32)It's free from prostaglandins, silicones and parabens

    Cons

    • Just a friendly note to say the UKLash eyelash serum is 20% off today (33)The wand is thicker compared to others in this edit, which may make precise application tricky

    If you're yet to try Chāmpo, you're seriously missing out. I first fell in love with the Pitta hair growth serum – an effective tonic that optimises the hair-growth process – and now I'm lusting after the new Pitta Lash Serum.

    Sweep a layer on the top and bottom lash line, and in only a few weeks you'll notice improvements to the density and length of your lashes. And the best part? It's free of nasties which can cause irritation but is instead formulated with natural ingredients to support the lashes.

    Key ingredients

    Pentapeptide complexA blend of peptides –short chains of proteins –to stimulate hair growth

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    Best viral lash growth serum

    Glow For It Lash Growth Serum

    Just a friendly note to say the UKLash eyelash serum is 20% off today (34)

    Pros

    • Just a friendly note to say the UKLash eyelash serum is 20% off today (35)Thin wand for easy application
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (36)Fragrance-free
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (37)Takes two weeks to see results

    Cons

    • Just a friendly note to say the UKLash eyelash serum is 20% off today (38)Some reviewers noticed it caused redness to begin with, so we'd recommend a patch test

    If your 'For You' page looks anything like ours, you would have spotted this pink tube making many appearances. Glow For It's Lash Growth Serum has developed quite the hype, with TikTokers raving about how the formula has improved the length and strength of their lashes.

    Naturally, we had to test it for ourselves and we can confirm that the hype is warranted. In just two weeks we saw a noticeable difference in the density of lashes (we're waiting on length). Plus, it uses natural ingredients, like pumpkin seed extract, ginseng and calamus root, to stimulate hair follicles.

    Key ingredients

    GlycerinSupports the overall condition and strength of the lashes
    Green tea leaf extractCan aid lash growth
    BiotinEncourages strong lashes and will prevent fall out

    Best for conditioning the lashes

    Blink Brow Bar Luscious Lash Oil

    Just a friendly note to say the UKLash eyelash serum is 20% off today (39)

    Pros

    • Just a friendly note to say the UKLash eyelash serum is 20% off today (40)Nourishing ingredients, like castor and jojoba oil, to help growth
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (41)Formula feels lightweight on the lashes

    Cons

    • Just a friendly note to say the UKLash eyelash serum is 20% off today (42)Some may not like the mascara-style wand
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (43)Not suitable to use with lash extensions (contains oils)
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (44)Contains a fragrance, which some may not like

    Blink Brow Bar may be your go-to for microblading or a lash lift but know that the London-based salon also has some stellar products to use in your home.

    The Luscious Lash Oil is described by the brand as a "health shot for the lashes". Rather than prostaglandin it calls on a unique and plant-based oil blend to condition the lashes and stimulate growth – there's castor oil, jojoba, apricot kernel and rosemary, just to name a few.

    Key ingredients

    JojobaPacked with vitamin A vitamin D and vitamin E to condition the lashes and promote growth
    Apricot KernelA natural ingredient to promote long and thick lashes
    BambooKnown to promote growth and prevent hair loss

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    Best lash growth serum for application

    Sweed Eyelash Growth Serum

    Just a friendly note to say the UKLash eyelash serum is 20% off today (45)

    Pros

    • Just a friendly note to say the UKLash eyelash serum is 20% off today (46)Thin brush for precise application
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (47)Contains vitamins and hyaluronic acid to nourish
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (48)Fragrance-free

    Cons

    • Just a friendly note to say the UKLash eyelash serum is 20% off today (49)Takes some time to see a difference

    Sweed’s clever serum is boosted with nourishing and growth-stimulating ingredients to encourage fuller, longer lashes.

    Bolstered by vitamins and hyaluronic acid, the lightweight formula feeds your lashes with hydration while strengthening brittle hairs. Alongside added peptides, the serum aids keratin growth to result in silky, longer lashes.

    I also appreciate the super-slim brush to ensure that the product is only applied directly onto the lash line, and not the surrounding skin.

    Key ingredients

    PeptidesHelps to stimulate growth, encouraging longer and fuller lashes
    BiotinConditions the lashes to improve their strength
    Pumpkin Seed ExtractContributes to the overall strength, health and appearance of the lashes

    Best pay day lash serum

    Augustinus Bader The Eyebrow and Lash Enhancing Serum

    Just a friendly note to say the UKLash eyelash serum is 20% off today (50)

    Pros

    • Just a friendly note to say the UKLash eyelash serum is 20% off today (51)Results can be seen in as little as two weeks
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (52)Thin wand for application
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (53)Milky formula feels nourishing on the eyelashes
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (54)Fragrance-free

    Cons

    • Just a friendly note to say the UKLash eyelash serum is 20% off today (55)£££

    This pick isn’t something you’d casually pick up at the checkout while shopping for a new mascara.

    It’s an investment for those who are serious about the length and long-term health of their lashes – because when I say it works, it works.

    If I can’t believe it myself, the number of times I’ve had people ask if I’m wearing falsies proves it. It’s hard to part with the cash but, if you want to ditch the lash extensions for good, it’s the best way forward.

    Key ingredients

    TFC8 technologyConditions the skin around the lashes, creating the perfect environment for hair to grow
    Roselle and Safflower ExtractsPrevents irritation around the lash line that may lead to hair loss

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    Best for preventing lash loss

    Scandinavian Biolabs Bio-Pilixin Eyelash Growth Serum

    Just a friendly note to say the UKLash eyelash serum is 20% off today (56)

    Pros

    • Just a friendly note to say the UKLash eyelash serum is 20% off today (57)Money-back guarantee
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (58)Easy application roller ball
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (59)Doesn't contain prostaglandin, so great for those with sensitive eyes

    Cons

    • Just a friendly note to say the UKLash eyelash serum is 20% off today (60)Some may prefer a brush for closer application to the lash line

    The Scandinavian Biolabs Bio-Pilixin Eyelash Growth Serum has a rollerball applicator as opposed to a brush, making it more hygienic while giving your lids a cooling massage as you roll the product in.

    The clinically tested formula – created by medical experts and tested by dermatologists – contains biotin to condition, capilia longa to reduce hair loss and an amino acid blend to boost lash strength.

    Glide it on every day and after five months you should see a great improvement in your lashes strength and length – if not, you’ll get your money back.

    Key ingredients

    BiotinActs as a conditioner to promote healthy lashes
    Capilla LongraA natural compound, said to help hair density by preventing hair loss
    Amino-acid blendImproves the strength and condition of hair

    Best lash serum for growth

    Olaplex Lashbond Building Serum

    Just a friendly note to say the UKLash eyelash serum is 20% off today (61)

    Pros

    • Just a friendly note to say the UKLash eyelash serum is 20% off today (62)Contains Olaplex’s proprietary bond-building technology to promote lash strength and density
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (63)Contains hydrating ingredients, such as hyaluronic acid, to promote nourishment
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (64)Ophthalmologist tested
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (65)Large tube

    Cons

    • Just a friendly note to say the UKLash eyelash serum is 20% off today (66)Takes consistent use to see results
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (67)Not specified whether it contains fragrance

    If you’re an Olaplex girlie, you’ll be thrilled to know that the brand also has a lash serum – and this is like no other I've tried.

    Like your hair needing a healthy scalp to grow from, the same rule applies to your lashes. If your barrier is compromised (think: mascara wiggling and excessive scrubbing) it’ll prevent long lash growth.

    Lashbond uses the brand’s bond-building technology to support the skin around your lash line, as well as peptides to stimulate growth. It's a quick worker too, with results showing after a few weeks.

    Key ingredients

    Olaplex Peptide Complex TechnologyA patented peptide to boost the lash growth cycle
    Patented Olaplex Bond Building TechnologyCreates a healthy skin barrier for hair to grow
    Hyaluronic Acid and biotinHelps to condition for nourished and glossy lashes

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    Best budget lash serum

    The Ordinary Multi-Peptide Lash and Brow Serum

    Just a friendly note to say the UKLash eyelash serum is 20% off today (68)

    Pros

    • Just a friendly note to say the UKLash eyelash serum is 20% off today (69)Affordable
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (70)Easy application
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (71)Lightweight formula that doesn't overwhelm the lashes
    • Just a friendly note to say the UKLash eyelash serum is 20% off today (72)Fragrance-free

    Cons

    • Just a friendly note to say the UKLash eyelash serum is 20% off today (73)Takes consistent use to see results

    The Ordinary is famed for its ingredient-led formulas that genuinely do bits. So, nothing is different with its lash serum – and at a budget-friendly price which we could all do with right now.

    While the results won’t be as transformative as costly alternatives, with loyal use it’s a great middle ground if you’re wanting to boost the overall health of your lashes.

    Use twice daily and the peptide complex helps to stimulate denser, fuller lashes.

    Key ingredients

    Myristoyl Pentapeptide-17Stimulates keratin production to encourage hair growth
    Biotinoyl Tripeptide-1Strengthens the hair follicle to prevent hair loss
    CaffeineStimulates hair follicles to encourage growth

    How do eyelash serums work?

    Just a friendly note to say the UKLash eyelash serum is 20% off today (74)

    There are so many factors that can contribute to lash loss. Tugging too hard with makeup remover is a main culprit, curlers can put stress on your lashes and even something as innocent as an eye mask can rub and cause brittle and weak lashes. Not to mention falsies and extensions – that's a different story.

    Luckily, a top-quality lash serum with a nutrient-packed formula can recondition lashes and stimulate faster growth. So, what's the secret?

    It all started with prostaglandin – a lipid-based ingredient used to treat glaucoma that was later discovered to have lash-lengthening benefits. But if you’re looking for a formula that contains high levels of prostaglandin, you won’t have much luck as earlier formulas were subject to controversy for causing low-risk side effects (think: redness and pigmentation).

    So, as you may have guessed, most serums are now fortified with a much weaker prostaglandin base – or an alternative active – so that even the most sensitive can get on with them. Peptides and proteins also feature heavily, working to stimulate growth and encourage dense, dark lashes.

    While every product on the market will have been tested heavily, and many are dermatologically and ophthalmologist tested too, it's important to read the instructions and follow them fully as some serums may suggest a patch test.

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    How should I use an eyelash serum?

    Just a friendly note to say the UKLash eyelash serum is 20% off today (75)

    All lash serums have a fine brush or felt-tip style applicator to localise the product on your lash line, without it seeping into your eye or surrounding skin. This way, the serum will directly feed your lash follicles to boost them to their max potential. So, all in all, if you pick a reputable brand and do a patch test (it's always wise to) you're good to go.

    Just a friendly note to say the UKLash eyelash serum is 20% off today (76)

    Clare Stephenson

    Senior Beauty Ecommerce Writer

    Clare Stephenson is the Senior Beauty Ecommerce Writer forCosmopolitanandWomen’s Health, covering all things makeup, skincare and hair care, as well as deals events includingBlack FridayandAmazon Prime Day.

    Clare has been an e-commerce writer since 2022, writing matter-of-factreviewssuch as deep dives intoskin concernsandshopping pagesfilled with her favourite products for every budget and need. When she’s not typing away, Clare is in front of the camera creating shopping content for Cosmo’sTikTok Shop, testing the most viral beauty products to know.

    Before working at Hearst UK, she received a BA degree in Multimedia Journalism at Bournemouth University, focusing her studies on the world of magazines and editorial. From there, she worked as an editorial assistant atVoir Fashion Magazine, covering events like Fashion Week and interviewing reputable brand founders. Outside of work? You can find Clare strolling along London’s Columbia Road Market, pouring her fourth coffee of the day or horseback riding in the countryside.

    Follow Clare on Instagram @clarefrancesstephenson

    Just a friendly note to say the UKLash eyelash serum is 20% off today (2025)

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