Computer generated model of the chemical structure of Vitamin C. Vitamin C or Ascorbic acid is essential for the formation of collagen and intercellular material, bone, teeth, and for the healing of wounds. It helps maintain elasticity of the skin, aids the absorption of iron and improves resistance to infection. Vitamin C is used in the treatment of scurvy and may prevent the development of cancer. Good sources of Vitamin C are Broccoli, Brussels sprouts, green leafy vegetables, red peppers, chilies, and citrus fruit.