It Also Contributes To The Normal Formation Of Collagen For Normal Function In: Blood Vessels, Bones, Joint Cartilage, Gums, Skin , Teeth. Vitamin C Contributes To Normal Energy Metabolism , Nervous System Function , Psychological Function Of The Immune System. Vitamin C Contributes To: Protecting Cells From Oxidative Stress Reducing Tiredness And Fatigue. Suitable For Vegetarians And Vegans