According to official health claims by the European Food Safety Authority (EFSA), vitamin C contributes to:

• Normal psychological function.
• Increased iron absorption.
• Normal functioning of the nervous system.
• Protection of cells from oxidative stress.
• Normal functioning of the immune system.
• Normal collagen formation for the normal function of blood vessels, bones, cartilage, gums, teeth, and skin.
• Vitamin C contributes to normal collagen formation for the normal function of the skin.