We Tested 31 Lash Growth Serums—These Are the Ones That Delivered the Best Results (2024)

TL;DR

Our top pick for the best eyelash growth serum is the Borboleta Lash Serum. It's ophthalmologist- and clinically tested, has a thin, almost weightless consistency, and has great ingredients. In our testing process, it proved to noticeably improve lash length. If you're looking for quick results, the RapidLash Eyelash Enhancing Serum delivers on length, too.

Our Top Picks

Highlighted Ingredients: Biotin, peptides, keratin, plant-based stem cells | Cruelty-Free: Yes

Powered by a blend of biotin, peptides, keratin, and plant-based stem cells, this cruelty-free, ophthalmologist-tested, and clinically-tested lash growth serum is impressive. The serum applies quickly and easily with just one swipe of the small brush across the lash line. Its thin consistency dries down within seconds and doesn’t leave a sticky residue on our skin or between lashes.

While we didn’t notice a difference in the density or thickness of lashes, we were blown away by how well this serum worked at lengthening them. After consistently using the serum throughout our 10-week test, we noticed a significant improvement in the length of our eyelashes. The difference was so noticeable that a coworker (who had no idea we were testing a lash serum) complimented our eyelashes. If length is what you hope to improve, we highly recommend this formula.

Ashleigh, tester: “I am impressed with my results. My lashes are definitely longer! I was honestly skeptical that this would work, but I am really happy to be proven wrong.”

Highlighted Ingredients: Amino acids | Cruelty-Free: No

You mayhesitate to use a lash serum if you have sensitive skin or eyes. However, some options, such as this one, may work for you without irritation, which did not irritate our tester's eczema-prone eyelids. An ophthalmologist has tested the formula and utilizes the power of amino acids to help fortify lashes damaged by consistent makeup wearing. Moreover, the brand claims this formula minimizes the amount of lashes that fall out during makeup removal.

Cindy, tester: “I enjoyed this product—it strengthened and lengthened my lashes, giving the illusion of fuller lashes. Plus, it did not aggravate or irritate my eczema at all.”

Highlighted Ingredients: Peptides, amino acids, hyaluronic acid | Cruelty-Free: Yes

Chances are, you’ve either seen ads for the popular Grande Cosmetics GrandeLash-MD growth serum, or you know someone who’s tried it. We are seriously impressed by how well it thickens lashes and brows. Our hairs appear fuller, feel stronger, and are noticeably more breakage-resistant. In terms of the application, the fine brush applicator makes for a mess-free, targeted distribution without having to constantly re-dip into the tube. Do note that if you get the formula into your eyes, you might experience significant eye sensitivity. So, while we highly recommend this for people who are looking to thicken their lashes, we suggest taking your time to apply it very carefully.

Elena, tester: “It was amazing. I can see and feel the substantial difference in the thickness and strength of both my lashes and brows. They're thick, and honestly, they seem happier. Yes, my eyelashes seem happier.”

Highlighted Ingredients: Peptides, biotin, amino acids | Cruelty-Free: Yes

Eyelash growth serums require a consistent application and a whole lot of patience before you notice results; that’s just the nature of these products. But, with this pick, we noticed an immediate thickening and lengthening within a few weeks as lashes went from short and stubby to longer and more uniform. We also loved that the brush picks up just the right amount of the formula, and once applied, it absorbs within a matter of seconds without causing any irritation. It is not a budget option by any means, but for those looking to lengthen their lashes ASAP, it will do the trick.

Rachel, tester: “I definitely noticed a difference in my lashes after using this product, which I was very happy about. They grew a lot longer and uniform, although not quite as thick as I was expecting. Still, it did wonders for growth, and I am enjoying the overall fuller look.”

Highlighted Ingredients: Rhamnose, hyaluronic acid, Vichy volcanic water | Cruelty-Free: No

This serum combines eye cream and eyelash serum application into one easy step, making it an excellent option for those who like to keep their beauty routines quick and easy. The formula doubles as an anti-wrinkle serum for the delicate skin in the eye area and a lash fortifying and conditioning serum. You simply pump out some product onto your fingertip and apply it to the eye area, sweeping it across your lash lines. Although the pump applicator might be hard to control (it can dispense too much product), the results make using the serum well worth the inconvenience. After the full ten-week testing period, we saw a real improvement in the strength and fullness of our lashes, with fewer lashes falling out when taking off our makeup.

Emma, tester: “I notice a difference in my lashes and like their overall appearance. Even if this serum did not completely wow me with immediate effects, I like that it has a dual purpose as a lash growth serum and wrinkle reducer.”

Highlighted Ingredients: Peptides, biotin, amino acids, vitamin B | Cruelty-Free: Yes

There’s no denying that this lash growth serum is expensive, but the results are very noticeable, so we can justify the price tag. Formulated with a blend of peptides, biotin, amino acids, and vitamins, it strengthens the lashes, protects against breakage, and significantly lengthens them. Throughout the testing period, we noticed eyelashes feeling stronger and more resistant to breakage, but the dramatic improvement in lash length really stood out. Easy application and noticeable results? Sign us up!

Agne, tester: “I look like I have doll eyes! After a month of use, my eyelashes basically doubled. I was expecting something only I would notice, but multiple people have now asked if I've gotten extensions or am wearing falsies.”

FAQ

• How do lash growth serums work?

  Lash growth serums essentially stimulate your eyelash hair follicles and keep them in the anagen phase (the active stage of the hair growth cycle). Formulas usually contain nourishing and strengthening ingredients, like biotin, peptides, and amino acids as well.

  You'll also find lash growth serums formulated with prostaglandins. Though the mechanism isn't very well understood, this class of ingredients has a hormone-like response that tricks the normal hair-growth cycle, effectively stopping the resting phase and stimulating growth wherever it's applied.
  

• Are lash growth serums safe?

  Though eyelash growth serums are generally considered to be safe, Dr. Henry shares that there are some potential risks and side effects to keep in mind. “Some people may experience irritation, redness, or itching around the eyes, especially if they have sensitive skin,” she explains. “In rare cases, eyelash growth serums can cause changes in the color of the iris or the skin around the eyes. It's also possible to experience eyelash breakage or brittleness if the serum is overused or applied incorrectly.”
  

  If you have sensitive skin or eyes, it’s wise to consult with your doctor before trying one out. Dr. Henry also stresses that in order to ensure you’re using a lash growth serum safely, it’s important to follow the manufacturer’s instructions carefully. She also says to avoid getting the serum in your eyes and be sure to wash your hands after application.

• Can you use lash growth serums with eyelash extensions?

  According to Imani, you can pair lash growth serums with eyelash extensions. She recommends opting for a formula that focuses on lash health to strengthen your natural lashes throughout the life of your extensions.

• How long do lash growth serums take to work?

  On average, it'll take anywhere from three weeks to two months for a lash growth serum to start working. It may technically begin working sooner, but the growth will likely be too small to see with the naked eye until a bit later. We tested these serums over 10 weeks.

  But bear in mind that this isn't a once-in-a-while treatment like a hair mask. You'll have to use the product every day (potentially twice a day), as directed, to achieve the desired results.

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