An advanced 10% Niacinamide serum to help minimize pores' appearance and help improve post-acne dark spots and surface redness while promoting an overall radiant complexion. An advanced 10% Niacinamide serum to help minimize pores' appearance and help improve post-acne dark spots and surface redness while promoting an overall radiant complexion. Sunday Riley uses advanced, clinically proven ingredients blended with balancing botanicals for non-irritating, fast-acting formulas that work to transform the skin.