This Derm-Approved Lash Growth Serum Has 22,000 Five-Star Reviews, and Right Now It’s 30% Off

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When we '90s kids used to imagine what the 2020s would be like, it was always flying cars, smart houses, and robot butlers that sprang to mind. One thing that we never could have predicted? All of the lash-enhancing technology that would be at our fingertips come year 2022. From lash-lengthening mascaras to heated eyelash curlers to pro-grade lash lifts, there's a seemingly endless number of ways to make our lashes look like their longest, most luxurious selves. Our favorite next-gen option, though? Grandelash MD Lash Enhancing Serum, which is not only derm-and opthamologist-approved, but is currently 30 percent off in honor of Amazon Prime Day.

The serum has racked up nearly 22,000 five-star reviews, and California-based board-certified dermatologist Shirley Chi, MD, isn't surprised by its popularity.

"It has a lot of amino acids and peptides in it, which creates a good environment for hair to grow," she says. "If you have a good environment, then the hairs are more likely to grow longer." Of course, this doesn't actually mean you'll have more hair follicles—it simply means that the lash strands you already have will look more nourished, which will give you that fuller, more fluttery look. "Your lashes will look thicker, not only because of the conditioners that are in the product—which do make your hair look more voluminous—but because the proteins and plant extracts make a good ambiance for your hair to grow longer," she says.

And that's exactly what the serum's done for a whopping 97 percent of happy customers who noticed fuller lashes after a month, according to a clinical trial conducted by the brand. "It's popular because a majority of people see satisfactory results, usually after about a month or so," says Veronica Tran, brow expert and founder of Pretty in the City. Her advice? If you're going to try it for yourself, less is more. "Apply once a day, in the evening after cleansing," she says. "Apply one stroke along the lash line for each eye. If you apply too much, it doesn't work any faster and you may end up finding a buildup of gooey gel-like substance stuck in your lash line."

Some people I know are already hooked on the Grandelash—but it has made their eyes get a little red. Dr. Chi suggests this is because the serum got into their eyes, which would lead to irritation. Also, Tran recommends dipping the serum brush into the container once, and swipe only once on each side for the best results. So be strategic with your application. But once you nail it, you'll be well on your way to butterfly lashes in about a month.

"With GrandeLash, I saw a visible improvement in the length of my lash hairs in 6 weeks," writes one reviewer. "I've been using this product for over a year...I LOVE IT!! My lashes are so long and have become darker...when I wear this with my good mascara, people always ask if I have falsies on," says another.

Considering you can now snag this game-changing lash serum for under $50, consider this your chance to test its tech for yourself.

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Our editors independently select these products. Making a purchase through our links may earn Well+Good a commission.

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