Vitamin C and other antioxidants are present in the epidermis and dermis of healthy skin. Levels of this vitamin decrease over time due to age and damage from ultraviolet rays. Applying a vitamin C serum is the most effective way to replenish levels. Discover the benefits of vitamin C for skin and the best brightening and rejuvenating treatments.\nProtection From Free Radicals \nVitamin C helps skin recover from and resist oxidative damage. Several forms of this vitamin are used in skin care. Ascorbic acid is potent, but has a short shelf life. Vitamin C + E Ferulic Acid serum is effective for up to three months or longer if refrigerated. Matrixyl 3000 with Vitamin C contains ascorbyl phosphate, a more stable derivative that has a shelf life of up to two years. \nCollagen Protein Synthesis \nThis vitamin also regulates the synthesis of collagen, which is responsible for skin elasticity and firmness. Some vitamin C benefits include increasing the rate of synthesis to repair skin damage and supporting the proliferation of fibroblasts, which prevent and reduce wrinkles. A potent topical treatment can reverse structural changes in the interface between the dermis and epidermis associated with aging.\nPhoto Protection\nVitamin C does not absorb ultraviolet rays, but this vitamin can limit structural damage over time. Due to the acidic and exfoliating nature of vitamin C topical treatments, it is crucial to wear sunscreen after application.\nStudies of topical application of vitamin C have found that a 20 percent solution allows for maximum absorption. Vitamin C + E Ferulic Acid serum contains this concentration of potent ascorbic acid, and should be refrigerated to prolong the effectiveness of the formula. Other vitamin C skin care products include a hyaluronic acid serum without vitamin E that is suitable for oily skin and HA + C Matrixyl 3000 facial spray with orange extract for all skin types.