Vitamins Vitamins Vitamins are organic substances in food, which are required in small amounts but cannot be synthesized in adequate quantities by the body and therefore have to be provided from the environment. These are particularly common in people on fad diets, veganand alcoholics.
Deficiency diseases are more prevalent in developing countries.
For example, Vitamin A deficiency is a common cause of blindness in the developing countries. As new researches bring out conflicting results, the recommendations about Vitamins continue to swing between 'just enough' to mega-dose therapies. Therefore it is important to be aware of what the Vitamins are. Carotene compounds responsible for transmitting light sensation in the retina of the eye. Deficiency leads to night blindness.