Whether you're experiencing natural thinning or have plucked your eyebrows into near-extinction, these customer-loved serums will thicken, lengthen, condition, and give your brows new life.

By Susan Brickell
March 06, 2020
Each product we feature has been independently selected and reviewed by our editorial team. If you make a purchase using the links included, we may earn commission.

If you are someone who has over-plucked her eyebrows (who decided to arm teenagers with tweezers in the 90s?!), noticed your brows have started to thin or lose their tails over the years, or simply want thicker, fuller arches, it might surprise you that you don't need to invest in a pricey treatment like microblading to get the eyebrows of your dreams.

Fuller eyebrows have been a popular trend for years—thanks to natural beauty campaigns and A-listers like Cara Delevingne, who embrace wild, bushy brows—but unfortunately, many people struggle with the ability to grow them out. Why? It might be due to genetics or trauma to the brows from previous plucking, says Joshua Zeichner, M.D., director of cosmetic and clinical research in dermatology at Mount Sinai Hospital in New York City. (Related: The Best Eyelash Growth Serums for Serious Length, According to Customer Reviews)

Luckily, eyebrow growth serums exist to help encourage optimal growth of hair follicles without breaking the bank. Brow serums contain many of the same hardworking ingredients as eyelash growth serums, including peptides that promote healthier lashes, which can lead to enhanced thickness and length, explains Dr. Zeichner. Some eyebrow serums also feature ingredients like biotin to support hair follicle activity, amino acids to protect from breakage, and conditioning agents that hydrate and strengthen the hairs themselves, he adds. (Related: Are Biotin Supplements the Miracle Beauty Fix Everyone Says They Are?)

Even better? Brow serums are safe for all skin types—but search for serums that are hypoallergenic and ophthalmologist-approved if you want to ensure that they won't cause any irritation to sensitive eyes and skin. (Related: 15,000 People On Amazon Are Obsessed with This Dual Lash and Brow Serum)

Ready to score thicker, bolder brows? Ahead, the eight best eyebrow growth serums that really work, according to customer reviews.

Pronexa Hairgenics Lavish Lash Eyelash Growth Enhancer & Brow Serum

eyebrow serum lavish lash
Credit: AMAZON

Boasting more than 15,000 glowing five-star reviews—on top of being one of Amazon's best-selling makeup products overall—the formula for Pronexa Hairgenics Eyelash Growth Hancner and Brow Serum contains natural, botanically-derived ingredients, including hydrating hyaluronic acid and growth-promoting biotin, to lengthen, thicken, and protect eyebrows (and lashes, to boot). Plus, it's hypoallergenic, dermatologist-tested, and safe for those with allergies or sensitivities. Even more impressive? In terms of results, reviewers liken it to the cult-favorite Rodan + Fields Enhancements Lash Boost, but at a fraction of the price.

RevitaLash Cosmetics RevitaBrow Advanced Eyebrow Conditioner Serum

eyebrow serum revitabrow
Credit: AMAZON

This hypoallergenic, ophthalmologist-formulated (read: you don't have to worry about it irritating your eyes) brow serum features peptides, lipids, biotin, and green tea extract, which help strengthen, thicken, soften and condition eyebrows while improving hair health and protecting from breakage. Many Amazon reviewers claimed to see major results with consistent usage over the course of a month, and one customer even noticed hair growth within two and a half weeks.

Luxros Eyelash & Eyebrow Serum

eyebrow serum luxros

With 90 percent of reviews being four and five stars, shoppers swear this serum is not only safe for those with sensitive eyes, but it will also initiate growth in sparse or balding areas of the eyebrow with nightly use—seriously. Made with natural botanicals, this hardworking serum moisturizes the hairs, protects against brittleness, and adds shine to brows at a super affordable price. (Related: The Best Eyebrow Makeup If You're Just Not Ready for Microblading)

Grande Cosmetics GrandeBrow Brow Enhancing Serum

eyebrow serum grande brow
Credit: AMAZON

Another ophthalmologist-tested formula, this serum is gentle on eyes and helps promote fuller, bolder brows with consistent use over two to four months. While it might be a bit of a splurge, Dr. Zeichner likes this option since it contains amino acids and hydrating hyaluronic acid to enhance the thickness and length of your brows. And Amazon reviewers can attest to fuller brows. One writes: "My outer 1/3 of eyebrows were sparse, now they are full. I had a bald spot on the center of my left eyebrow which is now filled in. It's been nine weeks and I now have bushy eyebrows. This product worked amazingly well."

Organys Lash and Brow Serum

brow growth serum organys
Credit: AMAZON

This affordable pick proves that it works just as well as pricier eyebrow growth serums on the market, thanks to powerful ingredients like keratin, peptides, natural botanicals, green tea, and nettle root, which help to strengthen frail hairs or thinning hair follicles. Even though it has a friendly price point, reviewers promise that it won't irritate eyes or skin, it doesn't contain comedogenic ingredients (read: won't clog pores or cause breakouts around your eyes), and it will actually fill in sparse or bare spots on eyebrows.

Joey Healy Brow Renovation Serum

brow growth serum joey healy
Credit: AMAZON

Dr. Zeichner is a fan of this splurge-worthy serum, because it combines peptides, hyaluronic acid, and wheat protein to strengthen, moisturize, and promote brow growth. Also great? The formula contains vitamins A, B5, C and E to protect and condition the hairs, and botanical ingredients like white tea, licorice, and rose to support the health of your brows. One customer raved that they had "no regrets" once purchasing this serum and were blown away by the insane amount of growth. (Related: 4 Eyebrow Shapes That Look Good On Anyone)

Kate Blanc Cosmetics Castor Oil

brow growth serum castor oil
Credit: AMAZON

While it might not be considered a serum, more than 600 Amazon customers awarded this bottle of castor oil five stars for giving them thicker and stronger eyebrows and eyelashes. ICYDK, castor oil comes from the seeds of the castor oil plant and is a natural source of proteins, vitamins, minerals, and omega-6 fats—meaning it adds thickness and shine to hair while encouraging growth. This product comes with a glass droplet for easy application, and a spoolie to comb the oil through your brows to ensure proper coverage. (Related: How to Use Castor Oil for Thicker Hair, Brows, and Lashes)

RapidBrow Eyebrow Enhancing Serum

brow growth serum rapid brow

Packed with peptides, keratin, biotin, and sweet almond oil extract, this under-$25 serum works to give the appearance of more voluminous brows, while nourishing, conditioning, and adding shine to each hair. Just sweep this serum through your brows with the easy-to-use wand once in the morning and once in the evening for best results. Reviewers say they not only love the low price tag but they saw a noticeable difference in brow growth between two and eight weeks.


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