Niacinamide (Vitamin B3) and Zinc are both renowned to reduce the appearance of skin blemishes and make our Niacinamide Serum a great product for oily or combination skin. The 10% concentration of Niacinamide reinforces the skin’s barrier function and improves the texture of your skin. Niacinamide is a sebum reducing, pore-reducing and anti-inflammatory ingredient that also has a lightening effect on your skin.