Main product description Vitamin B3 serum is suitable for combination to oily skin with a pronounced T-zone and irregularities. It can be used in the morning and evening or as needed and is applied to clean and slightly moistened skin before creams and/or oils. Due to the specific composition, it can be combined with Vitamin C Fluid SPF 30 or SPF 50 cream, as well as serums based on peptides, retinoids and hyaluronic acid. The product does not contain added dyes and fragrances. Use: Apply the serum to cleansed and moisturized skin before creams and/or oils. Use morning, evening or as needed.