A vitamin is an organic chemical compound that humans cannot synthesize in sufficient quantities, and must be obtained through the diet.
There are many vitamins that are all required in small quantities for us to maintain optimum health. Some are fat soluble such as Vitamin E others such as Vitamin C and B are water soluble.
Vitamin C is an essential nutrient with a daily recommended daily amount for the USA as 75mg for females and 90mg for males.
Vitamin C or ascorbic acid is added to foods for nutritional reasons but also for its anti oxidant property.