The Cos De Baha Niacinamide 20% + Zinc 4% Serum is a highly concentrated vitamin serum specifically designed for the care of demanding skin. With a powerful formula of 20% niacinamide and 4% zinc, it supports the skin barrier, reduces redness, and refines the skin's appearance. Ideal for all skin types, especially for blemish-prone skin. The lightweight texture absorbs quickly without leaving a greasy film. A successful model from a proven skincare line that hydrates the skin and gives it a healthy look.