Are you trying to find eyebrow growth serum among various brands on the market but aren’t sure where to begin? To assist you in finding the right one, we’ve put together a list of the 7 best to help you pick the perfect one!
We investigated and evaluated a number of the top-selling eyebrow growth serum on the market in order to create our list of the best. Making a decision among the many options available is never simple. There are an infinite number of models available, each with a distinct price. And as you’ll find out, the best options aren’t usually the ones you imagine! This comparison is rich and relevant because of the numerous factors that were employed. You will find products featured in this ranking not only based on their pricing but also on their features and other customers reviews. To write this review, we completed 15 hours of research and did 26 eyebrow growth serum tests. You won’t need to pick products at random any more. If you’re unsure of what to look for, browse our list and consult the buying guide!
An overview of our top picks
Table of contents
The best eyebrow growth serum you can buy today
- Extract of Ginseng Root and Tuber Fleeceflower: Both Ginseng root and Tuber Fleeceflower are traditional natural ingredients valued for thousands of years. Viebeauti integrated the extract of these 2 precious plants into our formula to give you healthy and lush eyebrows.
- 2-4 Weeks for Thick and Luxuriant Eyebrows: Our eyebrow serum is specially formulated with natural ingredients that work wonders to boost hair growth and improve the shine of your brows within the shortest time possible.
- Scentless and Fragrance-Free: Contains natural ingredients with no fragrance added, no need to fret over unfamiliar or nasty smells.
- Safe and User-friendly: Natural ingredients that can keep the skin below your brows hydrated and moisturized. Suitable for all genders and all skin types.
- Convenient & Hassle-free: Say goodbye to eyebrow lamination, brow perming, tinting, and other complicated procedures. Brush a thin layer of Viebeauti eyebrow growth serum and allow your brows to grow naturally.
- 【Critical Safety Reminder】DO NOT apply this product on eyelashes or lashes. Avoid any contact with the eyes to prevent potential redness or itching. In the event of accidental contact, rinse promptly with water. 【If irritation or allergic reactions occur, cease use immediately.】
- Promotes Longer and Thicker Eyebrows: The Eyebrow Growth Serum is designed to strengthen and magnify your eyebrows, resulting in longer, fuller, and thicker brows. It provides extra volume and enhances the appearance of your eyebrows.
- Nourishing and Gentle Formula: The serum contains a nourishing blend of ingredients, including scientifically-advanced technology and natural botanicals. This formula helps prevent breakage and brittleness while improving flexibility, moisture, and shine of your eyebrows.
- Easy and Safe Application: Applying the Eyebrow Growth Serum is simple and hassle-free. It can be easily incorporated into your nightly routine, and the product is completely safe and effective for use.
- Fast and Visible Results: With regular use, many users can expect to see results in just four weeks. However, for optimal results, it is recommended to use the serum for at least 60 days. The eyebrows are the slowest growing hairs on the body, and the best results can be observed after 90 days of consistent use.
- ACHIEVE LONGER & THICKER EYEBROW: The eyebrow growth serum for thicker brows is crafted to strengthen and boost your eyebrows, leading to extended, more voluminous, and denser brows. It provides additional fullness and elevates the visual allure of your eyebrows. This eyebrow growth serum is eyebrow serum to grow brows.
- NOURISHING & NATURAL INGREDIENTS: The eyebrow growth serum for thicker brows is infused with a blend of nurturing ingredients that combine advanced science with natural botanicals. This formula not only wards off breakage and brittleness but also amplifies your eyebrows' elasticity, hydration, and radiance.
- QUICK & SATISFIED RESULTS: Consistent application often leads many users to witness improvements within just 4~6 weeks. However, for optimal results, it is recommended to use this eyebrow growth serum for thicker brows for at least 60 days.
- SAFE & USER-FRIENDLY: Natural ingredients that can keep the skin beneath your brows hydrated and moisturized. Suitable for all genders and all skin types. The eyebrows are the slowest growing hairs on the body, and the best results can be observed after 90 days of consistent use.
- LONG-LASTING SUPPLY: The lash and brow serum provides a supply for 3 months, guaranteeing you have enough product to reach your eyebrow growth aspirations. This facilitates continuous application and enhances the chance for enduring outcomes.
- GET LONGER & THICKER EYEBROW: Our Eyebrow Growth Serum and Enhancer created to strengthen, magnify, prime. It gives extra volume even to your eyebrow, the result is longer, fuller, faster, and thicker eyebrows.
- NOURISHING & NATURAL INGREDIENTS: Our Eyebrow Growth Serum is made from natural & the highest quality ingredients, it is a nourishing serum that will help your brows go grow stronger and healthier on daily use.
- GENTLE and SAFE for ALL SKIN TYPES: Our Eyebrow Growth Serum is non-irritating, gentle, and safe for all skin types. And it is proven by science and nature, experience drastic increases in length and thickness of your eyebrows! Never tested on animals and cruelty-free.
- CLINICALLY PROVEN: Our formula has been proven to help boost thickness, fuller, length, and bolder looking of eyebrows with only 3-4 weeks of daily use. Perfect for sparse, thinning, over-plucked, or tail-less brows.
- EASY to USE: With the brow applicator tip, apply the serum to the root area of the eyebrows, the serum works great as a primer as well just 1-2 minutes for the serum to dry.
- Gives you beautiful and stylists look
- Skin friendly ingredients
- Long lasting coverage
- PURE AND USDA CERTIFIED ORGANIC CASTOR OIL: Kate's Organic Castor Oil is known for its purity and organic ingredient.
- GROW LONG EYELASHES AND BOLD EYEBROWS: promote eyelash growth and eyebrow growth; use the dropper to apply drops on eyelashes and nails
- STIMULATE AND PROMOTE HAIR GROWTH: use pure castor oil as a hair treatment pack for dandruff, dry brittle hair, and dry scalps; natural castor oil helps grow longer and thicker hair while diminishing hair loss
- SOFTER AND SMOOTHER SKIN: apply castor oil daily to reduce blemishes, acne, pimples, scars, and fine lines without leaving your skin dry; pure castor oil has a sticky consistency because it's full of moisturizing fatty acids to keep your face and skin moisturized throughout the day
- Formulated with an exclusive complex to boost the appearance of lashes and brows
- Ideal for women and men with brittle, weak, thin or short lashes and brows
- RapidBrow Eyebrow Enhancing Serum improves the appearance of eyebrow fullness and density in as little as 60 days!
- Polypeptides: beneficial amino acids help support flawless, youthful-looking brows
- Biotin: an essential factor in maintaining healthier-looking, youthful brows
- RevitaLash Cosmetics, the leading Physician led, award-winning line of lash, brow and hair focused cosmetics specifically designed to elevate, restore, & enhance the health & natural beauty of your most treasured beauty assets.
- Item Package Length: 4.318cm
- Item Package Width: 4.318cm
- Item Package Height: 11.43cm
- A COMPLETE KIT - Contains everything needed to grow your lashes and brows -- 1 fl oz organic castor oil, a glass dropper, 5 eyelash wands and 5 eyebrow brushes
- EASY TO USE - Apply Castor Oil to thin or thinning hair to encourage eyebrow and eyelash growth and nourish follicles
- A NATURAL SERUM - Naturally rich in Vitamin E, Omega 6 and Omega 9, Organic Castor Oil promotes the health of brows and lashes
- HIGHEST QUALITY AVAILABLE - Our oil is certified USDA organic, cold-pressed, hexane-free, unrefined, and packaged in a glass bottle
- BY PURE BODY NATURALS - Vegan, gluten-free; cruelty-free; never contains parabens, phthalates or unnatural scents
- Made with Powerful ingredients: Obagi Nu-Cil Eyebrow Boosting Serum has Biotin which specifically targets the natural development of Keratin & clinically proven Lipid Compounds that target the phase of the brow hair cycle to provide thicker, fuller-looking eyebrows.
- Powered with NouriPlex Technology: This eyebrow serum is engineered with NouriPlex technology, a technology that contains the blend of four high-performing clinically proven ingredients to boost the serum for faster results & provide the necessary condition to the eyebrows.
- Easy to use: Simply apply the brow growth serum to your eyebrows once a day, preferably in the evening for best results with fuller, darker looking eyebrows in as little as 8 weeks, & more pronounced results within 12 weeks.
- Natural & Thicker Looking Eyebrows: Our serum has Sodium Hyaluronate & Panthenol. Sodium Hyaluronate is a form of Hyaluronic acid that retains water and provides the necessary hydration. Whereas Panthenol enables the eyebrows to maintain their moisture condition & texture improvement.
- Medical Skincare Brand: Obagi Medical is a global medical skincare brand that's focused on creating skincare products that help unleash the full potential of the skin. Our skincare products are formulated to deal with a wide range of skincare issues including acne, aging, hyperpigmentation and much more.
- SEE A DIFFERENCE in your lashes and brows with our organic castor oil for eyelashes serum! No more over plucked brows or sparse lashes! Grow back full eyebrows and beautiful thick long lashes! This pure castor oil organic cold pressed unrefined glass bottle is a natural eyelash growth serum and eyebrow growth serum, whose healing properties deeply nourish your hair to stimulate growth
- TRANSFORM YOUR HAIR - Repair split ends, prevent hair loss and stimulate growth with our cold pressed organic castor oil hair growth serum — the best castor oil for hair growth and health. Watch your locks come back to life with the powerful moisturizing and repairing properties of our natural hair oil for thicker and healthier hair!
- GET GLOWY SKIN by using our organic castor oil for face and body application. Experience supple soft and smooth skin all over! Harness our oils reparative properties to fight acne, blemishes, scars, fine lines and dry skin while improving collagen, elasticity with an oil that won't clog pores.
- UNQUESTIONABLE QUALITY & SAFE FOR SENSITIVE SKIN- One thing that you will never have to question with Live Fraiche is our quality. Unlike some competitors who use expeller pressed oil, our organic cold pressed castor oil hexane free extraction process ensures the oil remains unexposed to heat that destroys key vitamins & minerals leaving you with only the most potent and high quality castor oil for lashes, eyebrows, hair and skin.
- ADORABLE PACKAGING FOR THE PERFECT GIFT - go no further than an all in one natural eyelash serum, eyebrow serum, skin moisturizer and hair growth oil for the beauty lover in your life. It's the gift that keeps on giving with a little going a long way! With thousands happy customers it's the perfect present for anyone that wants to look their best naturally!
- ACEITE DE RICINO TODO EN UNO PARA PESTAÑAS Y CEJAS: Trata y acelera el crecimiento de tu cabello, pestañas y cejas con nuestro aceite de ricino 100 puro y natural. Perfecto para tu piel, este aceite de castor organico puro, prensado en frío y sin hexano, retiene nutrientes clave proporcionando un brillo natural a tu cabello. Nuestra botella personalizada incluye un tubo de rímel gratis para aplicar este aceite de castor para cabello en las pestañas y las cejas sin ensuciar y con precisión.
- ACHIEVE BOLDER, FULLER BROWS quickly and naturally with Advanced Eye Brow Growth Serum by LUXROS. This plant based eyebrow serum features all natural active ingredients that stimulate formation of new follicles while hydrating and repairing existing brow hairs back to thick, strong and lasting life.
- FAST, PROVEN RESULTS have been reported in as little as 4 weeks. Clinically tested LUXROS Advanced Eyebrow Serum to grow brows uses essential fatty acids and antioxidants to nourish and strengthen brow hairs, making them thicker and less prone to loss.We recommend a minimum of60 days use. For optimal results, use LUXROS for 90 days.
- PHYSICIAN-FORMULATED from premium plant and botanical extracts, this natural eye brow serum for growth contains no phthalates, BHT, parabens, oils, gluten or other harsh chemicals to irritate sensitive eye tissue. LUXROS Lash and Brow Growth Serums are always cruelty-free for your peace of mind.
- MADE IN THE USA under rigid quality control protocols, LUXROS Eyebrow Growth Serum helps you grow new brows and revitalize the ones you already have. Simply brush the applicator over clean, makeup-free eyebrows once daily at night. Each 5ml tube provides 6 months of brow growth treatments.
- TASTEFULLY PACKAGED for impressive gifting, LUXROS Advanced Brow Serum to grow brows makes a thoughtful stocking stuffer for mom or wife. Natural and gentle, it will not interfere with the efficacy of her eye makeup or cosmetics and will have more lasting impact than a brow pen or eyebrow filler.
- Fuller Thicker Eyebrows: Brow enhancing serum promotes the appearance of fuller, thicker, bolder brows in 4-6 weeks, with full improvement in 3 months; Perfect for sparse, thin, dry, over-plucked or tail-less brows, create healthy looking brows
- Nourishing Ingredients: Eyebrow growth serum is made of natural ingredients; Contains moisturizing, soothing, nourishing ingredients that helps your brows to its fullness; It improves flexibility, moisture, and shine of your eyebrows
- Easy To Apply: Super simple and easy to apply a thin line on brows once a day before bed; Avoid any contact with the eyes; It is important to remove all traces of makeup before applying the eyebrow growth serum for thicker brows
- Effective Visible Results: Regular use of brow serum to grow brows, many users expect to see results in 4 weeks; For optimal results, it is recommended to use the serum for at least 8 weeks; Full results can be seen after 3 months of consistent use
- Gentle For All Skin Types: Continue to use this serum, you are going to have full, healthy, well defined eyebrows; You can experience increases in length and thickness of your eyebrows
- 🎖️【Gentle Formula Nourishes Eyebrows】 Natural Eyebrow Serum and Enhancer contains many gentle nutrients that are non-toxic and non-polluting to give you thicker, longer, fuller eyebrows.
- 🎖️【Natural Plant Extracts 】The eyebrow growth solution is extracted from natural plants and contains various nutrients suitable for eyebrow growth, deeply moisturizes the skin in the eyebrow area and promotes the growth of pore hairs.
- 🎖️【Easy to Use】This eyebrow growth serum is use friendly, clean your faces and remove all make up. Open the product and use the brush to gently scrub the eyebrow growth area, repeat the above steps regularly.
- 🎖️【Safe & Effective】Our eyebrow essence is free from harmful chemicals and is safe to use around the eyebrows. It's also clinically tested and proven to be effective in promoting eyebrow growth and enhancing eyebrow health.
- 🎖️【Long-term Use & Obvious Results】With regular use, many users can expect to see results in just four weeks. However, for optimal results, it is recommended to use the serum for at least 60 days. The eyebrows are the slowest growing hairs on the body, and the best results can be observed after 90 days of consistent use.
- For use on eyebrows - apply Brow Serum once daily to clean, dry eyebrows
- One dip of the wand is enough for one brow. Re-dip wand into serum for second eyebrow
- Using short strokes, apply Brow Serum to the natural shape of your eyebrow, especially on thin, sparse, or over-plucked areas
- Full of nourishing ingredients including castor oil, high-quality panthenol, strenghtening biotin, hydrating sodium hyaluronate, and repairing aminio acids.
- 4-month supply, evaluare results after 12 weeks of consistent use
- Complete Glow-Up: Our eyelash serum nourishes hair follicles, lengthening and strengthening natural lashes. Long-term use helps maintain your results, making your eyes pop without the help of makeup
- 2-in-1 Formula for Lashes & Brows: Powerful ingredients like biotin and castor oil in our lash and brow serum promote hair growth, thickening your eyebrows and filling in any existing bald spots
- Repairs & Revitalizes: Our eyelash growth serum repairs the damage caused by prolonged use of lash extensions. Peptides and antioxidants protect your natural lashes, keeping them strong and healthy
- Safe for Skin & Eyes: Our lash growth serum contains panthenol, vitamins E and B, and hydrolyzed silk to keep sensitive skin around the eyes hydrated and prevent irritation
- Put Your Worries to Rest: Our goal is to help you feel confident and beautiful. If you aren't happy with our eyelash and eyebrow growth serum, please let us know, and we'll rectify the situation
- Grow longer eyelashes and thicker eyebrows with our organic castor oil eyelash and eyebrow serum!
- SEE A DIFFERENCE in the length, thickness and overall health of your lashes and brows with our castor oil organic cold pressed hair growth serum! Over plucked brows or gaps in lashes? No worries! Grow eyebrows back and get the beautiful thick long lashes you've been wishing for! Our pure castor oil is an all-natural eyelash growth serum and eyebrow hair growth oil, whose regenerative healing properties deeply nourish hair follicles to deliver key vitamins and nutrients to stimulate growth
- EASY AND MESS FREE - Consider your time valuable? Don't waste it cleaning up a dripping oil dropper bottles & figuring out where to store sticky used brushes! Our lash serum tube has been specially designed to be convenient, quick & easy. It's PERFECT FOR FIRST TIME CASTOR OIL USERS and anyone who doesn't want to deal with a thick oily mess. The dual ended wand and tubes allow for precise, even & clean application to directly target hair follicles for maximum growth and hygienic brush storage
- 100% NATURAL USDA CERTIFIED ORGANIC - Live Fraiche hexane free cold pressed castor oil is imported from India with no chemicals used during the castor bean extraction process! Unlike some competitors who are using Expeller Pressed Oil, our Cold Pressed extraction process ensures that the oil remains unexposed to heat that destroys key minerals & vitamins vital to the oil's rejuvenating properties. It is safe for all skin types and the gentlest way to hair & skin that will leave others stunned.
- MAKES A GREAT GIFT - an all-natural eyelash serum and eyebrow serum growth oil with adorable packaging that will be loved! With thousands happy customers very happy it's the gift that keeps on giving with a little going a long way! One castor oil cold pressed eyelash growth mascara & brow growth serum will last about 5-6 months with daily use and it's the perfect present for anyone that wants to look their best naturally!
- Easy to Use - he lash growth serum is easy to use. Simply apply a thin line along the base of the upper and lower lashes morning and night, just like an eyeliner. Or apply the serum to your eyebrows after cleansing. Allow the serum to dry for about 1 minute. Use daily for best results.
- Visible Results - With regular use of eyelash growth serum, you can experience a dramatic increase in the length and thickness of your lashes and brows! Lashes grow significantly within two weeks. Each tube promotes new lash growth and strengthens existing lashes for bold, eye-catching eyes.
- Nourishing & Rich in Nutrients - Our eyelash growth serum is formulated with nourishing and natural ingredients. It helps nourish lashes and brows to treat thin, brittle or short lashes, and strengthen lashes and brows to make them look longer and fuller.
- Natural Ingredients - Our lash enhancing serum is plant-based and hormone-free. It helps weak lashes grow stronger and healthier.
- Eye-safe - Our serum is a safe, worry-free choice for daily use because it is non-irritating, gentle on all skin types, rigorously tested and approved by laboratories and clinics.
- BUNDLED FOR SAVINGS. This duo helps visibly reduce hair shedding and loss while supporting the body's ability to anchor the lash and brow follicle to the root system. The result is thicker, fuller, longer looking lashes and shapely, thicker looking brows.
- NEW RELEASE: Our limited edition clear BROW tube features the same award winning formula with an exciting upgrade. Experience full visibility and a redesigned opening for better brush saturation. Note: Your order may include this new tube.
- NATURALLY DERIVED. Suitable for all skin types, genders and age, our formulas feature advanced biotechnology, biodiversity and eco-designed resources. 5-active, synergistic ingredients help target all phases of the hair growth cycle.
- PROPRIETARY. Activated with the first ethically sourced, biodesigned elastin-renewing protein for hair rejuvenation, this double duo supports the natural replenishment and fortification of the Elastin Root System to help revitalize your lashes and brows.
- HOW TO USE. Apply serums twice daily, reducing to once daily when results are achieved. For brow serum, use the brush on brows and skin where needed. For lash serum, apply a thin line above the lash line on the top lid. Not recommended for bottom lashes.
- EYEBROW SERUM：Eyebrow growth serum is enriched with plant extracts that nourish your lashes, and over time, continued use of the Eyebrow growth serum will result in thicker, longer Eyebrow.
- Natural EYEBROWS：Day and night use, after removing makeup at night, before makeup in the morning can use eyebrow serum, continuous use, wake up the eyebrow growth, increase the restoration of nourishing eyebrow hairs, adhere to the above steps for 3-4 weeks can be seen noticeable results, for you to create a healthy and thick eyebrow hairs.
- NO IRRITATION：Our eyebrow serum is gentle on brows, non-irritating and suitable for all skin. The natural ingredients keep the skin underneath your brows hydrated and moisturized, helping to prevent breakage and brittleness while improving flexibility, moisture and shine.
- EASY TO USE：The Brow Enhancing Serum is very simple to use. On clean, dry brows, simply dip your brow brush precisely and evenly into the Brow Serum and use it once in the morning and once in the evening for great results.
- LONGER AND THICKER EYEBROWS：This plant extracts eye brow serum growth stimulates the formation of new hair follicles while moisturizing and repairing existing brows. For intensifying, amplifying and grooming brows. The result is longer, fuller, faster, thicker brows.
How to choose a good eyebrow growth serum
Does the idea of finding a fantastic eyebrow growth serum make you anxious? When it comes to purchasing this product, specifically when deciding which model to select, has your head been spinning between options? You are not alone if that is the case. We are aware of the pressure involved in the purchasing process!
Your presence here indicates that you are interested in eyebrow growth serum. Before choosing which product would be the best for your needs after being inundated with information, locate a reliable source with genuine selections. You can get that information from a variety of sources, including buying guides and rating websites, word-of-mouth recommendations from friends and family, online discussion forums where users can share their own experiences, product reviews that can be found all over the internet, and YouTube channels. You can only get the right product through exhaustive analysis. But you realize that’s not always simple. In order to ease your concerns, we have taken the time to develop a list of the top eyebrow growth serum products available right now. You might be wondering how we came up with the list. How was this buying guide developed?
First, we used our algorithms to gather as much reliable data as we could about these products. To verify all the data gathered, we used both artificial intelligence and a lot of algorithms.
Then, our experts used criteria that are recognized in the business to evaluate them according to their quality to price ratio, allowing us to choose the top eyebrow growth serum on the market right now!
The selection of the goods is not arbitrary. Before creating a list, we take into account a number of factors. Below are some of the criteria discussed:
Brand Value: What happens if you choose a dubious brand just because it appears to be a good deal? So the likelihood of receiving a product with a short shelf life increases. That is due to the fact that well-known brands have a reputation to uphold, while others do not. Top eyebrow growth serum brands strive to provide some distinctive traits that set them apart from the competition. So, hopefully one or more of the items on our list will be perfect for you.
Features: Useful features are all you need, not tons of them. We consider the important aspects and select the top eyebrow growth serum based on those.
Specifications: Numbers always help you measure the quality of a product in a quantitative way. We try to find products with higher specifications, but with the right balance.
Quality: A product’s quality may always be quantified with the aid of numbers. We look for goods with better standards that strike the proper balance. The best quality product that gets highly appreciated and recommended by experienced users.
Customer ratings: Would it be accurate to suggest that the eyebrow growth serum were used by hundreds of customers before you? Superior ratings indicate that many customers had better service.
Customer Reviews: Like ratings, provide you with accurate and reliable information about the product from genuine customers. Customer ratings are very important to all of us because they contain accurate and reliable information about the customer service we received from several hundred customers.
Seller Rank: This is very intriguing! Not only do you need a good eyebrow growth serum, you also need a product with rising sales that is trendy. It accomplishes two goals. First, the expanding user base proves the quality of the product. Second, given that number, producers must be able to offer greater quality and after-sales support.
Value: You get what you pay for, they say, so consider the value. Cheap isn’t always good and expensive isn’t always bad. However, that does not imply that spending a lot of money on a product that is flashy but underwhelming is a good idea. Before adding them to the list, we make an effort to evaluate how much value you can get for your money from your eyebrow growth serum.
Durability: Durability and reliability are closely related concepts. You will benefit from a strong and long-lasting eyebrow growth serum for months and years to come.
Product availability: Products come and go, and new ones replace the old ones. Most likely, a few new features and required changes were made. What use is it to use a supposedly good product if the maker no longer supports it? We make an effort to highlight products that are current and offered by one or more trustworthy sellers, if not more.
Negative Reviews: Yes, we do take that into account as well! The goods with the majority of bad reviews are filtered out and disregarded when we choose the best-rated one on the market.
These are the standards by which we selected our eyebrow growth serum. Do we end our process there? Hell no. The most crucial fact about us that you should be aware of is that we regularly update our website with current and pertinent information. We have one more layer of filtration since we place the greatest importance on reader satisfaction. Please let us know if any product included here is incorrect, irrelevant, subpar, or simply out of date. We always value your opinions, and we’ll work hard to make any necessary corrections to our list in response to them.
Why should you believe us?
There are now thousands of possibilities for these products on Amazon, but choosing the best one can be difficult and time-consuming. And what eyebrow growth serum should you purchase in 2022?
This guide is the result of more than 10 years of experience in researching, testing and writing about many topics. Each member of our team is an authority in their area. We read every article we could find online and every consumer review on every retail website for seven hours. Additionally, we discovered a ton of websites that offered helpful resources, including buying tips and thorough information on eyebrow growth serum.
