C-Therapy SerumC Therapy Serum This Product Is: a Vitamin C facial serum for sensitive skin Good For: all skin types, especially sensitive skin Why We Love It: Marie Veronique C Therapy Serum contains I ascorbic acid, an active form of vitamin C, which helps skin to produce collagen and provides antioxidant protection. This formula also includes glutathione and alpha lipoic acid which helps to protect the mitochondria, resulting in improved skin brightness and anti