KIEHL’S ULTRA PURE HIGH-POTENCY 5% NIACINAMIDE SERUM A concentrated 5% Niacinamide serum for oily skin made with only 10 ingredients that visibly reduces excess oil and imperfections. Kiehl’s niacinamide serum uses a potent and efficacious formula to minimise the appearance of shine and redness for balanced, healthy-looking skin~
