WHAT IT IS: DOCTOR BABOR 10% Vitamin C Refining Radiance Serum is a potent brightening treatment that helps visibly even skin tone, fade dark spots, and restore a healthy, radiant glow. The lightweight, fast-absorbing formula delivers powerful radiance-boosting results without irritation, making it ideal for daily use — even on sensitive skin. Skin appears brighter, smoother, and visibly renewed with continued use. WHAT IT DOES: Featuring BIOGEN PLANT EXTRACT and a stabilized form of 10% vitamin C (ethyl ascorbic acid), this antioxidant-rich serum supports collagen production while defending skin against environmental stressors that accelerate aging and dullness. HOW TO USE: Apply to the skin in the morning or evening after cleansing and work in. Then apply eye cream and moisturizer.