Obagi Nu-Cil™ Eyelash Enhancing Serum helps to nourish lashes for a more luscious, thicker, and defined-looking appearance with results that continuously build day after day. 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. Achieve face defining lashes and brows with our specially formulated serums made with Obagi's innovative NouriPlex® Technology, a synergistic clinically proven blend of ingredients shown to accentuate the healthy look of eyebrows and lashes in as little as 8 weeks of use.