Ascorbic acid, commonly known as vitamin C, is a water-soluble vitamin essential for various bodily functions. It plays a crucial role in the growth and repair of tissues, helps in the production of collagen, and acts as an antioxidant, protecting cells from damage caused by free radicals. Humans cannot synthesize ascorbic acid, making it necessary to obtain it through diet. Rich sources include fruits like oranges, kiwis, and strawberries, as well as vegetables such as bell peppers and broccoli. A deficiency in vitamin C can lead to scurvy, characterized by fatigue, gum disease, and skin issues.