The 8 Best Serums For Visibly Longer, More Luscious Eyelashes

The Ordinary The Lash & Brow Duo ($21)

If you're the type of person who likes a two-fer, we've got great news. The Ordinary Lash & Brow Duo allows you to get thicker, longer, eyelashes and eyebrows, all at the same time. The nongreasy formula only needs to be used twice a day, and the combination of peptide complexes promises denser lashes and brows in just four weeks.