Last Updated: May 8, 2023 @ 11:10 am.

What is the best lash serum? We tried out several brands to find the ones that worked best. Which were best for short or thin lashes? For older folks? Here are the ones we think performed best.

FYI: We've been reviewing and rating products for the home and families since 1994. We don't take money or freebies from the brands we review. Our work is 100% reader-supported!

Lash Serum 101: Tips & Tricks

Let’s talk eye lash serum.

These products are touted to stimulate eyelash growth, making lashes longer and thicker. Originally, the key ingredient for these serums (prostaglandins or PGA’s) made these serums prescription-only. That’s because prostaglandins have side effects.

The new over-the-counter eyelash serums have less prostaglandins than prescription brands as a result—so the good news is you don’t need a prescription to try it.

Note not all the serums in this article use PGA’s—given their side effects, you might want to start with a serum that doesn’t have this if you have sensitive skin.

We spoke with three board-certified dermatologists about lash serums to get their insights. Then we tried out several lash serums ourselves. Here are some key tips to keep in mind:

• It takes AT LEAST A MONTH to see any difference. We noticed that some brands tout improvement in four to six weeks, but most say it takes three months for complete improvement. So don’t expect to see changes overnight. In our tests, we tried out several brands for six weeks to get a baseline.

• These serums are for eyelashes, not eyebrows. 

• The main ingredient (prostaglandins) in many serums are lipids with a hormone-like reaction in the body—and that’s what causes the eye lashes to grow. Interestingly, the experts we spoke with said scientists still don’t know exactly how that works.

As always, we recommend consulting your doctor if you have any questions about these serums.

After trying out several brands in a long six-week trial, here are the lash serums we recommend.

Buy Now
Buy Now

Best for Thin Lashes

Easy to apply
This serum produced the best overall results in our tests—lashes that were longer and fuller than before.

Check on Amazon

Buy Now
Buy Now

Best For Sensitive Skin

Made in the USA
It took six weeks to see results here and we were impressed—noticeably thicker and longer lashes. No PGA's.

Check on Amazon

Buy Now
Buy Now

Best For Older Lashes

Used 2x a day
If you are older than 55, this would be our choice—it worked well growing longer, thicker lashes in 6-8 weeks.

Check on Amazon

Best Easy to Use

Gentle formula impressed
This serum can be used for both upper and lower lashes (not all brands recommend that). And we like the non-irritating ingredients.

Check on Amazon

About the Authors

Denise & Alan Fields are consumer advocates and best-selling authors. The Fields have authored 12 books with three million copies in print, including the best-selling guide to baby gear, Baby Bargains.

The Fields have been featured and quoted in the New York TimesWall Street Journal and Los Angeles Times.

As consumer products experts, the Fields have been guests on the NBC Today Show, Good Morning America and ABC’s 20/20.

How We Pick Products To Recommend

We often turn to our readers (3 million strong!) to find products to recommend. We ask our parent readers for their favorites and consider their real-world experiences in our recommendations.

When we test a product, we always purchase it with our own monies. We do not take free samples, as we believe that compromises our independence.

We also fact check manufacturer information with our own measurements. If a maker claims a product weighs X pounds, we will weigh it to make sure. If the battery life is supposed to be six hours, we will see how it stands up in the real world.

In some cases, we will do interviews with experts in the field to get additional feedback on products.

To get hands-on time with products, we regularly meet one-on-one with gear companies and even tour manufacturing facilities. (When we do this, we pay our own travel expenses).

Why Trust Us

We’ve been rating and reviewing products for the home and families since 1994. We do extensive research, evaluating products with an eye toward quality, ease of use and affordability.

We make our living from affiliate commissions, but we always recommend what we think are the best bets for our readers (not the ones that are the most expensive). We are always looking for products that offer the best bang for the buck.

Our independence is a key reason why we have been doing this so long. As we mentioned above, when we purchase a product for hands-on testing, we do so with our own money.

Here’s another key point: we don’t take money from the brands we review. No free samples, no sponsors, no “partnerships.” Our work is 100% reader-supported!

Baby Bargains: Your Baby Registry Cheat Sheet is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to and its related sites. As an Amazon Associate, I earn from qualifying purchases.