This serum with stabilized Vitamin C reduces signs of fatigue, smoothes the skin and immediately revives the radiance¹ of tired, dull facial skin by +21%. Key Components Rhealba Vitamin C Indication Anti-fatigue Smoothes the skin Antioxidant How to use Apply morning and/or night to clean skin. It can be used on its own or mixed (1 to 3 drops) with your daily moisturizer or serum for a personalized treatment.