MD Ultimate C Skin Brightening Serum penetrates deep into your skin to give you a healthy, younger-looking glow within 30 days. Vitamin C works to boost collagen production, increasing firmness and elasticity, as well as protecting it from harmful age-accelerators in the environment, such as the sun. Our potent serum has 20% L-ascorbic acid (a stabilized form of Vitamin C), which evens skin tone, boosts collagen production, provides protection from the encironment, and miminizes fine lines and wrinkles. The L-ascorbic acid remains potent by staying clear so your skin gets the maximum benefit. Another key ingredient, phyllanthus embillica fruit extract, contains Vitamin C and is a powerful antioxidant and anti-inflammatory. The Vitamin B3 and ferrulic acid, combined with the potent vitamin C, will repair and prevent sun damaged skin and will make your skin feel younger and more supple. With continued usage, MD Ultimate C will make your skin firmer and healthier.