Vitamin C

Essential nutrient found in citrus fruits and other foods

Vitamin C or ascorbate is a water-soluble vitamin found in citrus and other fruits, berries and vegetables. It is found as a form of ascorbic acid. It is an essential nutrient involved in the repair of tissue, the formation of collagen, and the enzymatic production of certain neurotransmitters.

From Wikipedia, under CC BY-SA. More on occurri.