The Stay C-50 in the Brilliance SF is a stable derivative of vitamin C. This component helps in effectively preventing aging caused by free radicals. The free radicals that are created in your body due to the exposure to various pollutants will be outnumbered by the additional collagen that will be developed in the body with the stimulative Stay C-50 in this cream, in addition to offering antioxidants to the skin to fight the free radical.