Direct Delivery Vitamin C SerumStimulating the cellular renewal process, Direct Delivery Vitamin C reduces the number of damaged cells, aiding the revision of ageing, scarring, skin tone and texture with a stabilised vitamin C formulation. One of DMKs most powerful skin rebuilding tools, Direct Delivery Vitamin C is a sophisticated serum used to stimulate collagen production, suppress pigmentation formation, protect against environmental damage as well as regenerate healthy skin.