14 best eyebrow serums that strengthen, condition and promote growth – tried and tested

Blink Brow Bar may be your go-to destination for getting your brows threaded or tinted, but don’t sleep on the brand’s eyebrow products for at-home care. I’ve been using the Brow Boost Growth Serum continuously for four weeks and somehow this lightweight gel has made my arches appear slightly fuller and thicker. The difference is minimal RN, I’ll be honest, but according to the brand’s clinical trials 80% of testers saw growth after six weeks.

I’m planning to keep it in my routine for the full six weeks (and beyond), because if this is the result at the halfway point, I’m expecting some impressive gains by the end. It’s all thanks to the formula, which is packed with growth-boosting ingredients like caffeine and biotin to help strengthen, hydrate and encourage healthier-looking brows.

We’re all familiar with the transformative results of Olaplex. So if your brows are in need of some serious love, check out the brand’s BrowBond Building Serum. Formulated with Olaplex’s Peptide Complex Technology, oat extract, hyaluronic acid and vitamins B5 and B7, this high-performing serum not only encourages growth but it keeps your brow hairs hydrated and strong. And once your brow hairs stop breaking and feel conditioned, this can actually make them look fuller even before new growth kicks in.

Of course, like with all brow-growth products, results vary person to person. But stay loyal to it and you’ll start to notice results within about 12 weeks of use.

Glowing customer review: “This brow serum was incredible! When I applied it every morning and night, my over-plucked brow started to grow hair all around it. With other serums, it took weeks for me to produce even baby hairs around that area.”

RapidBrow is a fantastic brow strengthener I’ve recently added to my routine to boost my brows after a very misguided decision to bleach them a few months ago (no photographic evidence, because I immediately tinted them back to their natural colour).

It’s loaded with gold-star hair-health boosters – including peptides and keratin, plus moisturising biotin and hyaluronic acid – as well as a soothing cocktail of allantoin and licorice root extract.

Cosmopolitan US Assistant shopping editor Jasmine Hyman also just started testing it and has been loving the gentle formula. “As a girlie who hasn’t gotten her brows professionally waxed or threaded in years, brushing up my brows before bed with the conditioning formula gives me the perfect clean girl feeling and finish,” she says.

Glowing customer review: “This is MY first review I’ve ever written about a product. I just finished my first RapidBrow serum bottle. My brows honestly got thicker, the best part, that hair actually grew back in my “bald spots” on my eyebrows – the small places were hair randomly stopped growing. My brows looked nice and conditioned after each use. Buying my second bottle today!”

Both dermatologists Dr. Marisa Garshick and Dr. Kavita Mariwalla like this simple eyebrow-growth serum as a moisturising option that’s still lightweight (see: the ingredients list without heavy oils and butters). “This formulation incorporates peptides, lipids, panthenol, and biotin to condition brows, along with calendula, which serves as a humectant to draw moisture in,” says Dr. Garshick.

Glowing customer review: “My eyebrows never had this much fullness or hair (even with tinting). Not even close. I can’t recommend this highly enough. It absolutely works.”

Got dry skin? Dermatologist Dr. Garshick recommends The Ordinary’s eyebrow-growth serum that’s filled with peptides to moisturise not only your brow hairs, but your skin itself, while also strengthening your skin barrier over time (and we know, moisturised hair = better chance at healthy hair growth).

Plus, it contains antioxidant-rich caffeine, which has some anti-inflammatory properties to help calm down irritation, which dermatologist Dr. Bhanusali, notes won’t necessarily make your brow hairs grow, but can potentially reduce inflammatory-based hair fall.

Glowing customer review: “I get dandruff-type flakes in my brows a lot, and I noticed since using this that I haven’t gotten them at all! It kept my brows moisturised.”

If you want bushy, filled-in brows without using an eyebrow pencil and gel, look to this eyebrow-growth serum from Grande Cosmetics.

It’s filled with strengthening amino acids, hydrating panthenol and hyaluronic acid, and antioxidant-packed grapeseed extract, all of which board-certified dermatologist Dr. Marisa Garshick says will help moisturise your eyebrows to potentially lead to “fuller, healthier-looking brows after six to eight weeks.”

Growing customer review: “I did not go into this with high hopes, but – oh snap – this stuff isn’t playing. My eyebrows are fuller and darker. I don’t feel like I have to fill them in before I leave the house, which is kind of a big deal.”

After hearing dermatologist Dr. Dhaval G. Bhanusali, rave about using minoxidil (the active hair-growth ingredient in Regaine) for eyebrow-hair growth, I decided to give it a go, knowing I could grab the over-the-counter online or any high-street store. But how does it work, exactly? Well, minoxidil helps prolong the growth phase of your hair-growth cycle, which can help increase the density of your hair before it sheds.

I’ve been following Dr. Bhanusali’s instructions and combing Regaine through my brows with a spoolie once a day for about four weeks. And my best friend recently noticed how full my brows looked on FaceTime when I had no makeup on (a sign that it’s def working, because my bare brows are usually thin AF). Because I’m only spreading it on my brows, so I’ll probably have this bottle for six to eight months at least, making it hella cost effective too.

Glowing customer review: “High fevers over an extended period of time made my hair and eyebrows fall out. I was so bummed. My hair grew back, but my eyebrows just never did. So a dab of this foam applied every night before bed for several weeks, and voilà! They’re growing back! So, so glad I tried it.”

I’m all about filling my bathroom with fancy face creams and luxury face masks that give me as much joy to look at as they do to use. So obviously, I immediately tried Augustinus Bader’s eyelash and eyebrow serum when it launched, which uses the same strengthening and moisturising ingredients found in its skincare line (like amino acids, hyaluronic acid, and castor oil).

It has moisturised the heck out of my brows, which has left them looking a bit more fluffed-up, especially in the very sparse areas around my arch. So yup, I’ll be replacing the bottle on my shelf when it’s done – and not just because it’s pretty AF.

Glowing customer review: “I’ve tried various ways of dealing with my disappearing eyebrows as I age, and this product is the easiest by far. A quick swipe on each brow, and that’s it. Minimal eyebrow gel required now, and I’m good to go.”

If your brow hairs feel brittle and are constantly falling out (and your doctor gave you a clean bill of health), try this lash and brow serum which uses arginine, an amino acid, to “help strengthen and boost your brows,” says board-certified dermatologist Dr. Marisa Garshick.

You won’t notice faster eyebrow-hair growth, but your brows will be stronger and more resistant to damage with continued use, which will lead to less hair fall and thicker brows over time.

Glowing customer review: “Purchased as I lost all my eyebrows and eyelashes due to chemotherapy. My doctor told me eyebrows take a long time to come back. I couldn’t be more thrilled with the results. Six weeks after I finished chemo, I have all my eyebrows back. I’m even thinking of canceling my micro-blading appointment!”

The castor oil in this drugstore formula won’t actually make your brows grow, but it will condition them a lil bit that will (1) keep them strong and help prevent premature shedding and (2) give them a nice coating that leaves them looking thicker. Which is why I consistently tell my friends to pick this one up on their drugstore runs when they ask me about the best eyebrow-growth serums.

Glowing customer review: “I have been using this serum for almost two weeks, and I have definitely noticed a change in my eyelashes and eyebrows. The ends of my eyebrows have always been sparse, but now they are less so.”

Flaky, itchy, inflamed brows are not only annoying to deal with but can potentially inhibit hair growth too. If that sounds like your brows, try this calming brow serum from Milk Makeup, which combines soothing aloe vera and cannabis seed extract (an anti-inflammatory derived from hemp plants) to help neutralise irritation. It also has a cocktail of peptides and panthenol to hydrate your skin and hair and help prevent moisture loss.

Glowing customer review: “This product has brought back brow hair that I haven't been able to regrow in 10+ years. It has filled in my brows so much that I no longer have to draw in the ends of my brows.”

TBH, I swear by this eyebrow gel mostly because the light colour matches my eyebrows perfectly when I’m in a hurry and don’t feel like filling them in with pencil. But lowkey, I’ve also noticed after swiping it on nearly every day for the last six months that my brows look way fuller now.

The combo of moisturising oils (jojoba oil, castor oil, and sunflower seed oil) and antioxidant-rich vitamin E help moisturise my brow hairs while lightly filling them with pigments to make them look thicker – with and without the gel.

Glowing customer review: “This adds just enough colour and enhances the appearance of my brows so they look fuller. I like using this in the morning, and then I also use the Grande Brow at night, and my brows have been looking amazing! So much fuller, especially in areas like the front and the tail that used to be really sparse.”