Marnys Vitamin C 1000 Vitamin C Contributes To Normal Immune Function And Cellular Protection Against Oxidative Damage This Unique Formula Provides Better Stability, Bioactivity And Higher Blood Availability Compared To Regular Vitamin C. Contributes To Normal Collagen Formation In Skin, Bones, Cartilage And Blood Vessels It Contributes To A Normal Energy Metabolism And Increases Iron Absorption.