Bnib luxury lash Serum. Never opened. NULASTIN eyelash serum features Elastaplex® Technology, a proprietary blend of biodesigned proteins and signal peptides formulated to boost elastin—the protein that anchors hair. This breakthrough technology helps minimize fallout and premature shedding by fortifying follicles at the root, resulting in visibly thicker, fuller looking lashes. Reveal your longest, strongest and fullest looking lashes with NULASTIN eyelash serum, awarded Best Lash Serum by NewBeauty. Clinically proven to boost lash appearance in as soon as 6 weeks, with double the volume in 12.