What if your makeup primer could also treat your skin? Most primers are designed to simply smooth your skin's surface and help foundation last longer — but the e.l.f. Power Grip Primer + 4% Niacinamide goes far beyond that. This innovative gel-based primer does double duty as both a skincare treatment and a professional-level makeup base, making it one of the most exciting beauty products available at k.beautyy right now. What Is Niacinamide and Why Does It Belong in Your Pri