NIB Naturium Azelaic Topical Acid 10% Plus Niacinamide Vitamin C, 1 fl oz. CONCENTRATED, POWERFUL FORMULA: Formulated with a high concentration of glycerinated azelaic acid complex, along with niacinamide, vitamin C and coffee seed extract to help improve the appearance of skin tone, for more radiant looking skin DEVELOPED FOR MOST SKIN TYPES: Appropriate for those with sensitive skin, though a patch test prior to use is advised. Use 1-2 pea-sized drops AM + PM, gradually increasing use until skin develops a tolerance