A maximum strength Niacinamide serum containing a 10% concentration of ultra pure Niacinamide combined with Tea Tree Oil, Calendula Extract and Vitamin B5. Niacinamide, one of the most highly praised ingredients in skincare nowadays, can effectively help to address some common concerns such as enlarged pores and uneven skin tone. When combined with Tea Tree Oil and Calendula Extract, it will help to maintain the skin clear and reduce redness and inflammation.