The Growth Serum That's Like Magic For Longer, Fuller Lashes & Brows Is On Sale

If you're on the path of shifting your beauty routine to be filled with clean and natural formulas, you should probably start with the products that come in close contact with your eyes. The sensitive area is prone to irritation and less likely to put up with the unwanted additives popular in many conventional formulas—whether you're applying a mascara, eyeliner, or eye shadow.

Another top priority for going clean? Your eyelash growth serum. The liquid formula settles onto the base of your lashes, coming into close contact with your eyes. Luckily, it's pretty easy to find a clean serum—and it just so happens that one of them is my all-time favorite product for getting major growth in my brows and lashes: the Kosas GrowPotion.

The 2-in-1 formula is safe for use on both eyebrows and lashes with a double-sided applicator that makes it easy to apply the formula on either area. Below, I cover everything you need to know about the product that streamlined my routine and brought me peace of mind knowing that my lashes were supported, sans harmful ingredients.

Kosas' lash and brow-boosting serum works to fill gaps in the brows (which I have plenty of, thanks to years of DIY plucking) and feeds your natural lashes with the nutrients necessary for growth.

The tube comes with a pointed-tip applicator, making it easy to swipe on the lash line and throughout the brow. Once applied, the clean formula is hydrating and gentle, never causing my lids to turn red or sting like previous serums that I've used.

This gentle and effective serum is packed with tons of skin- and hair-loving ingredients. First up, a trio blend of peptides to support hair length and thickness. Not only can peptides be hydrating to the skin, but they've also been further researched in recent years with promising results for eyelash health.

In one study1, researchers found that some peptides can stimulate keratin production, a key factor in hair growth. The results of their study included increased lash curl, length, volume, and thickness. So yeah, peptides are a must, and this serum checks that box three times over.

The last growth booster: vegan keratin. This protein helps encourage hair growth and strength while simultaneously promoting shine. You may be coating your lashes in mascara most days, but the added keratin in this serum will help your lashes and brows look their best—even without makeup.

Not every lash serum out there is safe for the eyes. However, this top pick from Kosas most certainly is—plus, it doubles as a brow serum and functional gel. The blend of natural ingredients works to support lash and brow hair health while soothing and hydrating the surrounding skin.