Our powerful serum is designed to give you lovelier lashes and brows by targeting their underlying nourishment and conditioning needs. That means lashes and brows that look longer, thicker, bolder, shinier, younger, and healthier—all in one. Results are clear within as little as four weeks and continue through 12 weeks. Plus, Lash + Brow Serum is ophthalmologist-tested, formulated free of prostaglandin, and safe to use even if you wear contacts. It’s the ultimate, clinically proven formula for all your lash and brow needs.