The main ingredient of this product is Vitamin C. This is a powerful anti-oxidant which means a chemical that limits the formation of free radicals that are produced in the skin by harmful ultraviolet rays from the sun, smoking and environmental pollutants amongst others. These free radicals are one of the main causes of discolorations in the skin. Hence, Vitamin C, together with other antioxidants found in Kleem Jeunesse enhanced Vitamin C serum such as Vitamin E, Aloe Vera and Ferulic Acid make it one of the top skin care products fighting against discolorations on the face.