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6 Lash Growth Serums That Actually Work
Your guide to the best lash serums of the year for visibly longer, fuller lashes
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Every woman knows the difference long, full lashes can make to our appearance. And while "glue-ons" may look great in the moment, wouldn’t we all prefer to grow our own stunning natural lashes?
Lash serums offer a long-term solution for women who want to help their natural lashes flourish—and break free from the constant falsies, extensions, and heavy mascara.
“Using a high-quality lash serum will actually help you (support) your own longer, thicker, denser-looking lashes so that you don’t have to use those quick fixes anymore," says Master Cosmetologist Beverley Simmons.
But, with so many empty promises in the cosmetics industry, it’s hard to know which lash serums will deliver visibly longer, thicker lashes... and which will leave you disappointed. That’s why Smarter Reviews has compiled the available research so you know what to look for in a quality lash serum that delivers results.
Key Ingredients in a High-Quality Lash Serum
Peptides
Peptides are unique chains of amino acids that promote visibly longer, fuller lashes. We recommend Acetyl Tetrapeptide (CapixylTM) and Biotinoyl Tripeptide (WideLashTM) because both were shown to be effective in scientific studies.
Red Clover Extract
This scientifically backed botanical was shown to support longer, thicker-looking lashes when combined with peptides.
Hydrolyzed Keratin
Keratin is the main protein in our lashes that keeps them looking thick and strong. Hydrolyzed keratin is a new, shrunken-down form that is small enough to absorb into your lashes when applied topically.
Vitamins
Lash-supporting vitamins like Biotin and Panthenol help nourish the natural lash growth process for long, healthy-looking lash strands.
Amino Acids
Amino acids are the building blocks that make up the inner structure of your lashes. Applying them directly to your lashes can support visible lash volume and strength.
Ingredients To Avoid:
Prostaglandins
Prostaglandin analogs are hormone-like chemicals known to cause harsh side effects—including rashes, pain, hollow eyelids, and in some cases, darkening of the iris and surrounding skin, which can be permanent. Due to these risks, the FDA recently prohibited the use of prostaglandins in cosmetics. Even so, several well-known lash serums still contain these chemicals—listing them under misleading names such as "Isopropyl cloprostenate."
Parabens
Parabens are known skin irritants that can disrupt healthy hormone function in large amounts—resulting in common side effects. Lash serums that do contain parabens may not openly disclose it on the label. So, always look for lash products that say "paraben-free."
FAQ: Your Lash Serum Questions, Answered
Are lash serums safe for the eye area?
If used correctly, most lash serums are safe. However, some of them may contain prohibited chemicals—like prostaglandins—which can irritate the eye or cause potentially irreversible side effects. Make sure to read labels carefully before applying!
How often should I use a lash serum?
This will differ depending on the serum. Most lash serums are designed to be used either once a day or twice a day. Based on our research, many people report seeing faster results with twice-a-day serums. But results will vary.
What happens if I miss a few days?
It’s best to use as directed, but don't worry! Missing a day or two won't greatly affect your results if you quickly resume using it again.
What happens if I stop using a lash serum?
A lash serum can be a great way to get longer, fuller lashes that last. However, your lashes will eventually return to their original appearance if you stop using it. After desired improvement is achieved, continue to apply daily in order to maintain benefits.
What Else to Consider When Buying a Lash Serum
Real Results Take Time
It's important to know that dramatic changes to your lashes won't happen overnight. It can take months for significant results. Month three is when many women report seeing a “night and day” difference in the appearance of their lashes, so if you want the full effect of a lash serum then stick with it at least three months to see longer, thicker, fuller lashes!
Clinically Studied Ingredients
The only way to verify that an ingredient produces longer, thicker-looking lashes is to test it on real people—in a clinical study. That's why we recommend finding a serum that contains clinically studied ingredients. “With more of those clinically tested ingredients, your chances of having better results go up exponentially,” explains Beverley Simmons.
Money-Back Guarantee
The beauty industry makes billions of dollars per year, which makes it easy for manufacturers with poor products to slip through the cracks. So make sure to get a lash serum from a brand that’s willing to stand by its product with a 100% money-back guarantee.
Top 6 Lash Serums Of 2024
When putting together our rankings, we consider the quality of ingredients, safety, return policies, projected effectiveness, and customer satisfaction.
First, here's a side-by-side comparison of how industry-leading lash serums stack up against each other.
Below are the final rankings from our beauty editors, complete with detailed reviews of each lash serum:
1. Lash24® AM/PM Formula
Owned by the Smarter Reviews Group of Companies
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Total Ranking
9.7/10
A+
Overall Grade
PROS
- PM Lash Serum + AM Primer
- 3 clinically studied ingredients
- 2-month supply
- Naturally derived ingredients
- Acetyl Tetrapeptide
- Biotinoyl Tripeptide
- Red clover extract
- Silk amino acids
- Hydrolyzed keratin
- Biotin & panthenol
- Prostaglandin-free
- Paraben-free
- 90-day return policy
CONS
- Exclusively sold in the U.S. & Canada
- Only available online
The Bottom Line
Hair La Vie's Lash24® contains three clinically studied lash ingredients. The formula also features two naturally derived peptides, silk amino acids, hydrolyzed keratin, biotin, and panthenol.
To top it all off, Lash24® is the first product of its kind to have dual purpose AM primer + PM serum formulas. Each tube contains 8ml of product, which should last around 2 months—this is almost 3x more than the other brands on our list.
Users of Lash24® reported longer, fuller-looking lashes within as little as 6-8 weeks. Hair La Vie also offers a 100% satisfaction, 90-day money-back guarantee, which shows us that they stand by their product.
*Results are based on the Smarter Reviews Ranking System and do not necessarily reflect typical results from the use of these products. Please visit product websites for more information.
Learn More2. Lunar Lash
Owned by the Smarter Reviews Group of Companies
Total Ranking
9.1/10
A-
Overall Grade
PROS
- 3 clinically studied ingredients
- Naturally derived formula
- Acetyl Tetrapeptide
- Biotinoyl Tripeptide
- Red clover extract
- Amino acids
- Hydrolyzed keratin
- Biotin & Panthenol
- Prostaglandin-free
- Paraben-free
- 60-day return policy
CONS
- 3ml of product per tube
- Only for nighttime use
The Bottom Line
Lunar Lash by Tru Alchemy ranks #2 on our list of top five lash serums. This PM lash serum delivers potent conditioners to help maintain hydration and support a longer, fuller look.
Lunar Lash is formulated with three clinically studied ingredients, including two peptides. It also contains clean ingredients like amino acids, hydrolyzed keratin, biotin, and panthenol that work to visibly improve lash length and volume.
Plus, Tru Alchemy’s risk-free return policy includes a 60-day, no-questions-asked guarantee. It may not be needed, however, as the effectiveness of the product earned a top score.*
*Results are based on the Smarter Reviews Ranking System and do not necessarily reflect typical results from the use of these products. Please visit product websites for more information.
Learn More3. Gro+ Advanced Lash Serum
Total Ranking
8.7/10
B+
Overall Grade
PROS
- 1 clinically studied ingredient
- Naturally derived ingredients
- Acetyl Tetrapeptide
- CBD, red clover, and mung bean extract
- Prostaglandin-free
- Paraben-free
- 90-day return policy
CONS
- Only 3ml of product per tube
- Can only be used at night
- Lacks hydrolyzed keratin and biotin
- Lacks amino acid complex
The Bottom Line
There's a lot to like about GRO+ Advanced Lash Serum by Vegamour. Like most contenders on our list, this serum is made with naturally derived ingredients, and is 100% vegan and cruelty-free.
In addition to a clinically studied peptide, Vegamour's formula also includes red clover, mung bean, and hemp-derived cannabidiol, which has been shown to help support blood circulation.
Unfortunately, it lacks essential nutrients like keratin, biotin, and an amino acid complex. Their tube only contains 3ml of product and can only be used at night.
On the plus side, people who used this product left highly favorable reviews, and many people found it to be an effective lash serum. Additionally, Vegamour offers a solid 90-day money-back guarantee.
*Results are based on the Smarter Reviews Ranking System and do not necessarily reflect typical results from the use of these products. Please visit product websites for more information.
Learn More4. GrandeLASH-MD
Total Ranking
8.1/10
B-
Overall Grade
PROS
- Panthenol
- Comprehensive amino acid complex
- Glycosaminoglycans
- Paraben-free
- 90-day return policy
CONS
- Only 4ml of product
- Can only be used at night
- Lacks peptides, keratin, and biotin
- Contains prostaglandin analog
The Bottom Line
GrandeLASH-MD's award-winning lash serum is infused with a potent blend of ingredients to help promote the appearance of longer, thicker lashes. Its formula includes panthenol, amino acids, and other lash-supporting ingredients.
However, it's also missing a lot of key ingredients: peptides, biotin, and hydrolyzed keratin. And unfortunately, GrandeLASH-MD's formula contains a prostaglandin analog, which may be responsible for some users reporting discoloration around their eyes after use.
Their formula comes in 2 different sizes, the larger containing 4ml of product, which still falls short of our top pick. Plus, it's only a night time serum. Grande Cosmetics offers a 90-day return policy if you're not 100% satisfied with their product or experience adverse side effects.
*Results are based on the Smarter Reviews Ranking System and do not necessarily reflect typical results from the use of these products. Please visit product websites for more information.
Learn More5. Lash Boost
Total Ranking
7.5/10
C
Overall Grade
PROS
- 2 peptides
- Hydrolyzed keratin, panthenol, and biotin
- 5ml of product
- 60-Day Guarantee
- Paraben-free
CONS
- Can only be used at night
- Lacks several key ingredients
- Contains a prostaglandin analog
- High price point at $155
The Bottom Line
Coming in at #5 is Rodan + Fields Lash Boost. Their formula includes favorites like panthenol, keratin, and biotin. However, it's missing other important ingredients like peptides and amino acids.
More importantly, Rodan + Fields recently came under fire for "deceptive labeling" and a lawsuit was filed on behalf of consumers, alleging a "failure to disclose the harmful side effects" of a prostaglandin analog in their formula.
Additionally, Rodan + Fields Lash Boost costs $155, which is 2-3 times as much as the average eyelash serum. On the upside, it does contain 5ml of product per tube. And if you're not satisfied with this product, Rodan + Fields offers a 60-day money-back guarantee.
*Results are based on the Smarter Reviews Ranking System and do not necessarily reflect typical results from the use of these products. Please visit product websites for more information.
Learn More6. Babe Lash
Total Ranking
7.2/10
C-
Overall Grade
PROS
- Biotin & panthenol
- Paraben-free
- Silk amino acids
- Green tea extract
- 90-day online return policy
CONS
- Contains synthetic prostaglandin
- 2ml of product
- AM formula sold separately
- Can only be used at night
- Lacks keratin and red clover extract
The Bottom Line
Rounding out our list is Babe Lash. This award-winning serum is formulated with peptides, biotin, silk amino acids, panthenol, and green tea extract to help lengthen and condition lashes.
However, it falls short in a few important categories. Most importantly, Babe Lash contains a prostaglandin analog, which has been linked to negative side effects, including discoloration around the eyes.
Secondly, their formula lacks keratin and red clover extract, which are important components of a high-quality lash serum. Although they offer both an AM and a PM formula, the two are sold separately—for a steep total of $88. However, Babe Lash offers a 90-day return policy for online purchasers, which shows they stand behind their product.
*Results are based on the Smarter Reviews Ranking System and do not necessarily reflect typical results from the use of these products. Please visit product websites for more information.
Learn MoreDisclaimer:
Smarter Reviews is owned and operated by the same company that owns certain products featured on this website, including the products ranked number one.
In addition, we receive compensation from certain companies whose products are featured on this website when you purchase a product using the links on this website.
Go back to pageOur Main Sources
Sources used for research purposes. Smarter-Reviews.com are not officially affiliated with these sites.
What You Will Learn:
Estimated Read Time 4 Minutes
CITATIONS
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3036812/
- Karaca and Akpolat, J Cosmo Trichol 2019, 5:1 DOI: 10.4172/2471-9323.1000140
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- https://pubmed.ncbi.nlm.nih.gov/28879195/
- https://www.researchgate.net/figure/Hyaluronic-acid-filling-in-the-left-temple-region-results-in-the-skin-necrotic-and_fig6_328647283
- https://www.agelyss.com/downloads/widelash.pdf
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6147748/
- https://www.yourhormones.info/hormones/prostaglandins/
- https://krcomplexlit.com/currentcases/rodan-fields-lash-boost-litigation