One caveat: “The brand’s clinical study is small—just 30 participants—and while 90% reported increased brow density, there’s no indication of how significant that increase actually was,” says Dr. Casey.
A water-based polymer gives brows flexible, all-day shape without flaking—and the formula has just enough grip to double as a subtle brow shaper, helping hairs stay lifted and in place.
- Key ingredients: Peptide Complex Technology, polymers, palmitoyl tetrapeptide-20 amide, oat extract, red clover extract,
- Fragrance-free: yes
- Application: twice daily
- Results: 12 weeks
Best Strengthening: GrandeBrow Brow Enhancing Serum
Why we love it: Recommended by numerous dermatologists, GrandeBROW Brow Enhancing Serum features a standout ingredient: isopropyl cloprostenate, a prostaglandin analog. “Prostaglandins stimulate hair growth by prolonging the hair follicle’s growth phase. In addition to this powerful ingredient, the serum is enriched with plant extracts that naturally support brow growth,” says Dr. Kazlouskaya. Amino acids in the product also strengthen and fortify brow hairs, while hyaluronic acid conditions and hydrates, giving existing brows a fuller, healthier look. Stick with it for a few weeks, and you’ll start seeing brows bring their fullest A-game. (No wonder it’s a staple in Brooke Shields’ beauty routine.)
“It’s important to note that prostaglandins can sometimes cause skin irritation or pigmentation changes,” says Dr. Kazlouskaya. So, work with your dermatologist to make sure you’re not combining it with other actives that might cause hyperpigmentation.
- Key ingredients: isopropyl cloprostenate, amino acids, hyaluronic acid, vitamin E
- Fragrance-free: yes
- Application: nightly
- Results: 6-8 weeks
Best Fast-Acting: NeuLash NeuBrow Brow Enhancing Serum
Neulash
NeuBrow Brow Enhancing Serum
Why we love it: When you want fast results, multiple derms we spoke with highly recommend the NeuLash NeuBrow Brow Enhancing Serum for its innovative, peptide-rich formula. “It stimulates hair growth, enhances brow density, and improves shine, flexibility, and conditioning,” says Dr. Brimhall. “With a proprietary complex scientifically proven to boost thickness and ingredients like isopropyl cloprostenate, hydrolyzed vegetable proteins, and zinc-rich pumpkin seed and apple extracts, it deeply conditions brows. Plus, biotin to fortify and keratin to nourish and stimulate growth.” And just how quickly will you start to see improvement? “Most users see noticeable results within 30 days of consistent use, making it one of the fastest brow growth serums available,” adds Alexandra Bowles, MD, a board-certified dermatologist in Cincinnati, OH.
“It’s worth noting that it contains sodium laureth sulfate, a potential allergen, and a synthetic prostaglandin. For those with sensitive skin, a patch test is recommended to ensure compatibility before full use,” says Dr. Brimhall.
- Key ingredients: isopropyl cloprostenate, Dual-Weight Protein Complex®, sweet almond protein, biotin
- Fragrance-free: yes
- Application: nightly
- Results: 4-6 weeks
Best Lightweight: Nulastin Eyebrow Serum
Why we love it: Dermatologically tested, Nulastin Eyebrow Serum is formulated with peptides and keratin molecules to support healthy eyebrow growth and make brows appear fuller. “Peptides, which are small molecules crucial for the health and life cycle of skin and hair, play a vital role in numerous regenerative processes. Widely recognized in the cosmetic industry for their versatile benefits, peptides work alongside keratin to nourish and enhance your brows,” says Dr. Kazloskaya. This serum is super lightweight and absorbs quickly without residue, making it easy to layer under makeup for the day.
Apply the product using short, upward strokes to effortlessly shape and groom your brows into place.
- Key ingredients: elastin, peptides, keratin
- Fragrance-free: yes
- Application: morning and night
- Results: 6-12 weeks
Best Plant-Based: LashFood BrowFood Phyto-Medic Eyebrow Enhancer
Lashfood
BrowFood Phyto-Medic Eyebrow Enhancer
Why we love it: Finding a clean, effective brow serum isn’t always easy, but BrowFood Phyto-Medic Eyebrow Enhancer stands out as the only Ecocert-certified, clean beauty option on the market. Formulated with the plant-powered Phyto-Medic Complex, this serum is designed to naturally nourish and support healthier, fuller brows. Key ingredients like arginine, soy protein, and lavender water work together to condition and strengthen brows, reduce breakage, and encourage steady growth over time. “I like that it comes in sustainable packaging and the ingredients have been evaluated for biodegradability and ecotoxicity,” says Dr. Brimhall. It’s the perfect combo of gentle and effective for anyone chasing cleaner beauty without sacrificing results.
“It features camellia sinensis—green tea extract—which provides antioxidant protection, and ginseng, known for its hair-stimulating properties,” says Dr. Brimhall.
- Key ingredients: phyto-medic complex, arginine, soy protein, lavender water
- Fragrance-free: yes
- Application: nightly
- Results: 4-16 weeks
Best Multitasking: Obagi Nu-Cil Eyebrow Boosting Serum
Obagi
Nu-Cil Eyebrow Boosting Serum
Why we love it: If your brows have thinned from over-tweezing, shaping, or inactive follicles, the Obagi Nu-Cil Eyebrow Boosting Serum is here to help. A key player in the brand’s innovative NouriPlex technology is “dehydrolatanoprost, a prostaglandin analogue, which appears to be present in higher amounts in this serum to help with potency,” says Maryam Safaee, MD, a board-certified dermatologist based in Los Angeles. Dehydrolatanoprost mimics natural compounds involved in hair growth, and it’s known for helping push hairs into the active growth phase, similar to what’s used in many lash-growth serums. The formula also includes “biotin and panthenol to condition and moisturize the hair, sodium hyaluronate to keep brows hydrated, and phenethyl caffeate, an antioxidant that helps keep follicles healthy and ready to grow”—all of which create an ideal environment for fuller, denser brows, says Dr. Safaee.
It might look like a simple spoolie, but it’s specifically designed to glide through thin and thick brow hairs to coat each follicle with serum.
- Key ingredients: biotin, nouriplex technology, sodium hyaluronate, panthenol
- Fragrance-free: yes
- Application: nightly
- Results: 8-16 weeks
Best for Sensitive Skin: The Ordinary Multi-Peptide Lash and Brow Serum
The Ordinary
Multi-Peptide Lash and Brow Serum
Why we love it: The Ordinary Multi-Peptide Lash and Brow Serum is a lightweight, non-greasy formula that’s loaded with 11 straightforward yet powerful ingredients—like four peptide complexes and plant extracts—to keep your brows and lashes fortified and protected. “I recommend peptide-based serums like this because they stimulate follicle stem cells and minimize shedding rather than relying on hormone-like compounds,” says Dr. Kopelman. If you’re dealing with sensitive skin, ingredients such as peptides, plant stem cells, and natural DHT-balancing extracts “tend to give gradual but steady results with less irritation,” she says. The formula also combines acetyl tetrapeptide-3 and caffeine to “improve follicle anchoring and circulation, which helps hairs grow thicker and more resilient. I’ve seen excellent patient adherence with this one because it’s easy to apply and gentle for sensitive skin,” she says.
The formula’s camellia sinensis leaf extract (green tea extract) also stimulates hair follicles, combats oxidative stress, and makes brows less prone to breakage.
- Key ingredients: sympeptide xlash complex, widelash complex, redensyl complex, camellia sinensis leaf extract
- Fragrance-free: yes
- Application: morning and night
- Results: 4 weeks
Best for Dryness: Babe Original Amplifying Brow Serum
Babe Original
Amplifying Brow Serum
Why we love it: If dry, brittle brow hairs are contributing to breakage, Babe Original’s Amplifying Brow Serum has one of the most conditioning, hydrating formulas in the brow-serum category, thanks to castor oil, biotin, chamomile, sodium hyaluronate, and vitamin E, which work together to soften brittle hairs and nourish the skin beneath them. The plush doe-foot applicator makes it easy to saturate the entire brow area—great if you’re dealing with patchy tails or uneven density. “Their product contains a small amount of isopropyl cloprostenate, which is a prostaglandin analogue similar to bimatoprost, the main ingredient in Latisse,” says Dr. Safaee. And compared with the other isopropyl cloprostenate-based serums on our list, it’s also a more budget-friendly pick.
Because the doe-foot applicator fully saturates the brows, give the serum two or three minutes to dry before applying any other products to the brow or eye area.
- Key ingredients: isopropyl cloprostenate, castor oil, panthenol, biotin, hyaluronic acid, tocopheryl acetate
- Fragrance-free: yes
- Application: once daily
- Results: 12 weeks
Frequently Asked Questions
Which serum is best for eyebrow growth?
The best eyebrow growth serums focus on key ingredients that protect existing brow hairs and stimulate new hair follicles. “Prostaglandin analogs are among the most potent options, working to lengthen the growth phase of hair. Peptides stimulate the dermal papilla cells in hair follicles to support growth and strengthen hair shafts, while biotin boosts keratin production for thicker, more resilient brow hairs. Panthenol (vitamin B5) conditions and moisturizes to prevent breakage, and castor oil, rich in ricinoleic acid, enhances circulation to the follicles, potentially stimulating growth,” says Dr. Brimhall. These ingredients help kickstart new hair growth and level up the fullness, strength, and density of your brows.
Do eyebrow serums really work?
Yes, brow serums can work, but results vary based on genetics, age, skin, and overall health. “Brow serums can effectively promote the growth of fuller, thicker brows by stimulating stunted hair follicles and nourishing existing hair shafts,” says Dr. Brimhall. However, success depends on the condition of your brows and body. For instance, regrowth may be impossible if scarring from overplucking or injuries has destroyed the follicles. Similarly, those with naturally sparse brows due to genetics or age-related slowdowns in the hair growth cycle might see more subtle results than younger individuals with healthier follicles. “Your hair, skin, and nails often reflect your overall health. If you notice significant changes in your brows, it’s worth investigating the root cause to fully benefit from any brow serum,” she says.
What actually helps eyebrows grow?
“A healthy lifestyle, staying hydrated, managing stress, and maintaining a nutrient-rich diet with proteins, vitamins, and minerals are crucial for overall well-being and can promote healthier eyebrows and hair,” says Dr. Kazlouskaya. However, she emphasizes not relying solely on lifestyle changes, as hair and brow loss can sometimes signal underlying medical conditions. “In some cases, the loss may be irreversible if untreated, or it could delay diagnosing significant issues like autoimmune diseases or chronic skin disorders. Consulting a board-certified dermatologist helps identify and address the root cause, preserving hair health and overall wellness,” she says.
Meet the experts
- Alexandra Bowles, MD, board-certified dermatologist at MONA Dermatology in Cincinnati, OH
- Angela Brimhall, DO, board-certified dermatologist and founder of Sage Dermatology and MOHS Surgery in Draper, Utah
- Angela Sanfilippo Casey, MD, a double board-certified dermatologist based in Columbus, Ohio
- Viktoryia Kazlouskaya, MD, board-certified dermatologist and CEO of Dermatology Circle based in New York City
- Hannah Kopelman, MD, a board-certified dermatologist at Kopelman Hair Restoration, based in New York City
- Maryam Safaee, MD, a board-certified dermatologist based in Los Angeles
How we test and review products
When Allure tests a product, our editors look at it from every angle in an effort to best serve you. We review ingredients, scrutinize brand claims, and, when necessary, examine peer-reviewed scientific and medical studies. In addition to testing each and every product that’s included in each and every review, we rely on experts who shape their fields, including dermatology, cosmetic chemistry, and medicine, to help us vet the ingredients and formulas.
For our list of the best brow serums, we considered each product’s performance across four primary categories: product ingredients and efficacy, packaging, fragrance, and texture. Every product was determined to have excelled in each category by our editorial team, which is composed of in-house writers and editors as well as contributors—along with special consideration from dermatologists. To learn more information on our reporting and testing processes, read our complete reviews process and methodology page.
Our staff and testers
A beauty product is a personal purchase. You might be searching for a face cream to address persistent dryness or a new nail product to add to your Sunday self-care routine; you may simply be browsing around for the latest launches to hit the hair market. No matter what you seek or your individual needs and concerns, Allure wants to ensure that you love anything we recommend in our stories. We believe that having a diverse team of writers and editors—in addition to the wide range of outside testers and industry experts we regularly call upon—is essential to reaching that goal.
After all, can we really say a skin-care product is the “best” for people over 50 if the only testers we’ve solicited opinions from folks who have yet to hit 30? Can we honestly deem a high-end diffuser worthy of your hard-earned cash if it’s never been tested on curls? We’re proud that our staff spans a wide range of ages, skin tones, hair textures, genders, and backgrounds, which means that we are able to fairly assess any beauty product that comes into the beauty closet.
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