Tired of demystifying skincare, Kiehl's takes it back to basics with its latest Ultra-Pure collection. The beauty buff works to precisely target skin concerns by streamlining its formulas with only simple ingredients. Blended with oily complexions in mind, the High-Potency niacinamide serum contains 5.0% of the form of vitamin B to help minimise the appearance of redness and reduce the production of excess sebum. And the result? Shine-free, clear skin.| 'Kiehl's Ultra-Pure High-Potency 5.0% niacinamide serumApplication: apply 4–5 drops to clean, dry skin in the morning and evening. Layer with other serums as neededSkin type: suitable for oily and sensitive skin typesBenefits: Niacinamide: to minimise appearance of pores, even skin-tone and soften fine linesFree from: fragrance, colourants30mlFor hygiene reasons, this product cannot be exchanged or refunded, unless faulty.'