Obagi Nu-Cil™ Eyebrow Boosting Serum is powered by NouriPlex® Technology, a clinically-proven blend of ingredients to address the appearance of thinning, patchy, and over-tweezed brows. Improves the appearance of fuller, thicker, darker-looking eyebrows. 100% of participants reported improvement in the appearance of brow fill at 8 weeks* 96% of participants reported improvement in the appearance of brow density and volume at 8 weeks *