The 10% vitamin C in this serum is designed to give skin a more radiant, firmer, and overall better appearance. Vitamin C that is activated by antioxidants shields the skin from UV ray damage and stops the formation of dark spots, revealing healthy, glowing skin. Using a serum is the simplest way to add this potent ingredient to your skincare regimen. Applying a few drops in the morning before using moisturizer will shield the skin from damage all day.