Do Lash Serums Really Work? Yes, But There’s a Catch
They're advertised as the long-awaited secret to longer, thicker, and fuller eyelashes, but let's be real: Do lash serums work? work? We definitely encourage you to embrace your inner skeptic, but the good news here is — yes, they can work, but there are a few caveats. For starters, let's dive into how they work. Dr. Joshua Zeichner, the director of cosmetic and clinical research in the Department of Dermatology at Mount Sinai Hospital in New York City, told InStyle that eyelash serums are responsible for two jobs. First, he says they hydrate and coat the surface of the eyelashes to volumize the hair itself. Second, he says they can either "directly stimulate the hair follicles or help create an optimal environment for hair follicle growth." The major catch we mentioned earlier? It takes quite some time for them to kick into action. Dr. Zeichner told InStyle that some lash conditioners have the potential to show an immediate (but not long-lasting) effect becaus