e.l.f. Discovery

How to Apply Eyelash Serum for Longer, Fuller-Looking Lashes

By Emma Izquierdo

Here’s the official PSA for anyone who’s ever wished to have longer, stronger, and fuller lashes: find an eyelash serum you love and never look back! Lash serums are designed to nourish, strengthen, and enhance your natural lashes, giving you that longer, fuller look—no extensions or lash lifts required.

But how do they work? Most lash serums are packed with conditioning ingredients like antioxidants, amino acids, and vitamins that support lash health at the root. The result? Stronger, more resilient lashes that can appear visibly longer and thicker over time. It’s no surprise these serums have gone completely viral in the past few years—beauty lovers swear by them for transforming their lashes with just a swipe a day. If you’ve been wondering whether lash serums actually work or how to apply them for the best results, you’re in the right place. Today, we’re answering all your biggest questions and giving you the ultimate guide to lash serum application so you can unlock your longest, healthiest lashes yet.

What is Eyelash Serum?

Think of a lash serum as the nourishing extra layer in your beauty routine. It’s one of those steps that may feel a little unnecessary at first (is this really doing anything?!) but then, over some time, you’ll see major results.

So, what are lash serums anyway? A lash serum is a lightweight, nutrient-rich formula designed to help lashes grow and promote the appearance of longer, fuller lashes over time. Unlike mascara or fake lashes, which give instant results, lash serums work their magic at the root, supporting your natural lash cycle for real, noticeable growth. Our Enhancing Lash & Brow Serum takes things up a notch by not only working to enhancing the appearance of your lash length, but also nourishing and conditioning your lashes, helping to keep them healthy and prevent breakage. Infused with key ingredients that strengthen and hydrate, this serum helps your lashes look their best—stronger, longer, and more defined.

Do Lash Serums Really Work?

In short: typically, yes! Most lash serums work by nourishing and strengthening your lashes at the root, helping them grow longer and look fuller over time.

Our eyelash serum is packed with antioxidants, which can help to protect your lashes from environmental stressors, vitamins that condition and support healthy lash growth, and amino acids, which are essential for strengthening each lash and helping prevent breakage. But remember—lash serums don’t work overnight! Patience is key, but trust us, it’s worth it for longer, stronger lashes that look and feel healthier!

Benefits of Using a Lash Serum

Without sounding too dramatic, eyelash serums can offer a host of benefits that go beyond what mascara or lash extensions can do! From a makeup look standpoint, using a lash serum consistently may help your lashes appear longer, fuller and more voluminous.

On top of that, lash serums may improve the overall appearance of your lashes, too. If you struggle with thin, brittle, or short lashes, these serums can be a game-changer, and may help to strengthen the appearance of your lashes. Plus, the benefits aren’t limited to just your top lashes; they can help the appearance of your bottom lashes appear healthier as well!

How to Apply an Eyelash Serum

Unlike a mascara, which does take some level of precision and care when applying, lash serums are clear and a little easier to apply. To correctly apply eyelash serum, use the thin-tip applicator and simply glide the serum across your lash line (top and bottom if you’re feeling extra). Apply it like you would a liquid eyeliner—except this one is effortless and mess-free.

You can apply your lash serum in the AM or PM, but we highly recommend making it part of your nighttime routine. Why? Because letting it work its magic overnight gives your lashes all the time they need to soak in those nourishing ingredients—no other makeup, no rubbing, just pure beauty sleep for your lashes. If you do apply it in the morning, feel free to curl your lashes for an extra lift. Just let the serum dry first so your lashes stay flawless for the day!

How to Wear Mascara with a Lash Serum

A question we get a lot is whether it’s okay to apply mascara if you’re also wearing a lash serum. And the answer is yes! If you do choose to wear mascara and a lash serum together, it’s extra important to keep mascara on your lashes only and the serum on your lash line. That way, each can do their individual eyelash-enhancing jobs correctly.

Ready to get started on your lash journey? We made it easy for you with this mascara and lash serum bundle. Just apply your mascara in the morning and your lash serum either morning or night and wallah! You’re on your way to longer, fuller-looking lashes.

Frequently Asked Questions About Lash Serum:

Q: Is it okay to use lash serum everyday?

A: Generally yes, it's safe to use eyelash serum daily! However, here are some important considerations:

• Most eyelash serums are designed for once-daily application, typically at night (do not apply more than once a day)

• Always follow the specific product instructions listed on the packaging

• Always apply to clean lashes

• Start gradually (2-3 times per week) to test for any eye sensitivity (If irritation occurs, reduce frequency or discontinue use)

Q: Do I put lash serum on bottom lashes?

A: Yes! You can apply eyelash serum to your bottom lashes. Here are some lash serum application tips if you choose to do so:

• Use a very light hand - bottom lashes don’t need as much product as your top lashes

• Apply carefully to avoid getting lash serum in your eyes

Remember to always test for sensitivity first and stop use if you experience any irritation.