The first widely available 10% niacinamide treatment, Paula's Choice Resist 10% Niacinamide Booster tightens pores, evens skin tone and reduces wrinkle depth. Designed to boost the results of your serum or moisturizer, this light-as-water, fluid formula enhances the results of your favorite skin care products, to enhance the results. Made with soothing agents, this concentrated formulation promotes calm, clear skin.