MDSUN Super Brightening C Serum 1oz / 30ml The highly-dense, quintuple-C-acid formula containing ascorbic acid, magnesium ascorbyl phosphate, and tetrahexyldecyl ascorbate is clinically proven to address multiple causes of skin discolorations, dullness, and visible signs of aging. Upon contact with skin, the powerful yet gentle Vitamin C acids work synergistically to help increase natural collagen production, provide essential antioxidant protection, accelerate skin cell renewal, and reduce hyperpigmentation activities. In addition to its brightening properties, this powerful serum transforms skin by providing deep hydration and intense free radical protection with sodium hyaluronate, potent antioxidants, and unique Ultrapack ingredients.