Obagi Nu-Cil^™ Eyelash Enhancing Serum helps to nourish lashes for a more luscious, thicker, and defined-looking appearance. Obagi Nu-Cil^™ Eyebrow Boosting Serum helps address the appearance of thinning, patchy, and over-tweezed brows resulting in the appearance of fuller, denser, and darker looking brows. Together, these two powerful serums create the perfect duo for achieving stunning lash and brow growth—ideal for your own daily skincare routine or as a gift for a friend.