For best results, we recommend using the Toplash Lash and Brow eyelash and brow serums together. Apply the gel during the day as needed and the serum before you go to bed. So, if you're tired of battling with lackluster lashes and desire a natural solution that actually delivers results, the lash and brow building serum is an absolute game-changer. With its easy application and remarkable effectiveness, this serum has transformed my lashes from drab to fab, giving me the confidence to flaunt my fluttery fringe. Say goodbye to fake lashes and hello to your own beautiful, head-turning lashes. Trust me, your lash journey will never be the same again! Here’s the thing: Although no other lash serum uses bimatoprost specifically, many lash serums do contain other prostaglandin analogs like isopropyl cloprostenate, isopropanol Phenyl-hydroxyl-pentene, dihydroxy-cyclopentyl-heptenate, and dehydrolatanoprost, which are thought to help grow and thicken your lashes like bimatoprost—though research is still lacking on their exact efficacy. Still, just because they haven’t been studied doesn’t mean they aren’t effective to some extent.