Cos De BAHA Arbutin Niacinamide Serum is a skincare product that contains Arbutin and Niacinamide as active ingredients. Arbutin is a skin lightening agent that is derived from plants and is used to reduce the appearance of hyperpigmentation, dark spots, and uneven skin tone. Niacinamide is a form of Vitamin B3 that is known to improve skin hydration, increase ceramide production, and reduce the appearance of fine lines and wrinkles. The serum may promote skin brightness and improve skin texture, tone, and hydration. It is recommended to use the product as directed by a skincare professional.