10 Best Eyelash Serums for Longer Natural Lashes

Castor oil has a long history of being the go-to source for hair growth of any kind. You can use this 100% natural ingredient on your lashes, brows, and scalp to promote hair growth. It also helps moisturize your skin! You can't beat the price point either for something this versatile.

If ensuring your products are vegan and cruelty-free is important to you, try Vegamour. It will take about a month to some magic happening (and up to four month for full results), but mung bean will be working in the background to produce thicker, fuller lashes without potentially harmful chemicals.

An effective serum under $10? Yes! You will see visible results in four to six weeks (though full results may take up to eight), thanks to the polypeptides and biotin in the formula. You can use it on your brows, too!

Using the power of biotin, green tea extract, and amino acids, RevitaLash not only lengthens, but strengthens and curls lashes, too. If can take up to 16 weeks to see the full results, but full they will be, indeed! This formula was also reviewed by ophthalmologists and dermatologists to ensure its safety.

It's easy to see why Alex is so obsessed with this serum. She started to see results in a mere three weeks, thanks to the collagen and peptide blends. She also said it doesn't irritate her eyes like some other serums have in the past. No wonder it's a bestseller!

Committing to a serum for several weeks or months can start to affect your beauty budget. GrandeLASH has a more affordable price point for their starter set and over 27,000 five-star reviews to prove it's worth every penny. This #1 bestseller relies on amino acids for growth and hyaluronic acid to reduce breakage.

If you have super sensitive eyes or wear contacts, consider ophthalmologist-tested LiLash. In six to 12 weeks, you'll see the results but not the irritation. The formula relies on plant-based lupine protein to grow lashes longer and stronger.

In just four weeks, you will start to see results with this well known drugstore staple brand. Much like its higher-priced competition, Neutrogena relies on biotin and peptides for lash growth. At this price, it's totally worth a try!

Full brows are just as popular as full lashes right now. If you struggle with thin eyebrows, try a serum that can tackle both issues. It may take eight to 16 weeks for full results, but both your brows and lashes will be thicker from an amino acid called arginine.

Chances are, even after serum use, you'll still need mascara to enhance your lashes. Why not do both at the same time with a mascara that contains a serum? The mascara lifts, separates, and colors your lashes while the arginine in the formula helps them grow naturally.