Eyelash Growth: What Works, What Doesn't, and What the Science Says

When it comes to eyelash growth, the natural process of extending and thickening eyelashes through biological or topical means. Also known as lash enhancement, it’s not just about beauty—it’s about understanding what your body actually responds to. Many people try serums, oils, or home remedies hoping for longer lashes, but most don’t know what’s backed by real science and what’s just marketing.

The only FDA-approved treatment for eyelash growth, a medical treatment that stimulates lash follicles to grow longer, thicker, and darker lashes. Also known as bimatoprost, it was originally developed for glaucoma before its side effect—longer lashes—was noticed. That’s right: eyelash growth isn’t magic. It’s pharmacology. Bimatoprost works by extending the growth phase of the lash cycle, which is why it’s used in products like Latisse. Other ingredients like peptides, biotin, or castor oil? They might condition lashes, but they won’t trigger real growth the way bimatoprost does.

Then there’s the world of lash extensions, artificial lashes glued to natural ones for immediate length and volume. Also known as false lashes, they’re popular for events or daily wear, but they come with risks—glue irritation, damage to natural lashes from improper removal, and even follicle scarring if done too often. And while they give instant results, they don’t change your biology. They’re a temporary fix, not a solution.

What about over-the-counter serums? Most are filled with plant extracts, vitamins, and claims that sound promising but lack clinical proof. A 2021 review in the Journal of Clinical and Aesthetic Dermatology found that only two products had solid evidence: one containing bimatoprost and another with a synthetic prostaglandin analog. Everything else? Mostly placebo effect and good lighting in before-and-after photos.

And don’t forget eyelash health, the condition of your natural lashes, including strength, moisture, and resistance to breakage. Also known as lash integrity, it’s the foundation any growth strategy should start with. Rubbing your eyes, using waterproof mascara every day, or sleeping with makeup on can weaken lashes over time. Even hot eyelash curlers can cause breakage. Healthy lashes grow better—and stay longer.

So if you’re serious about longer lashes, you’ve got two real paths: medical treatment with proven ingredients, or protecting what you’ve got. There’s no shortcut. No miracle oil. No overnight result from rubbing coconut on your lids. The science is clear: if it’s not stimulating the follicle, it’s not growing lashes. It’s just coating them.

Below, you’ll find real breakdowns of what works, what doesn’t, and what to watch out for—whether you’re considering a prescription, a serum, or just trying to keep your lashes from falling out. No fluff. Just facts you can use.