Obagi Nu-Cil™ Eyelash Enhancing Serum helps to nourish lashes for a more luscious, thicker, and defined appearance with results that continuously build day after day. Obagi Nu-Cil™ Eyebrow Boosting Serum helps address thinning, patchy and over-tweezed brows resulting in 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.* *2022 12-week study. Data on file at Obagi Cosmeceuticals LLC.