Pixi Beauty Vitamin-C Serum is an antioxidant-powered facial serum with Vitamin-C that brightens the skin by boosting both immediate and long-term radiance. If you're looking for a serum that provides a radiant glow - and so much more - you'll find it with this product. This enriching serum helps improve skin tone and creates a smoother complexion while reducing the effects of sun damage and free radicals. Pixi's multi-use Vitamin-C Serum can be used daily or as needed.