Lash Boost - Get lush, longer-looking lashes in as little as four weeks with ENHANCEMENTS Lash Boost™.* This nightly eyelash-conditioning serum features a unique proprietary formula that improves the appearance of lash volume and length for lashes that are 100% real, 100% yours. In weeks, you’ll be wondering if you need mascara at all. (5mL/0.17 US fl. oz.) *For best results, use Lash Boost for 8 weeks.