Vitamins are organic compounds required by the
body in very small amounts. It means vitamins are micronutrients.
Vitamins do not yield energy, but enable the body
to use other nutrients.
Vitamins are divided into two groups:
Water soluble vitamins (Vitamin B group and Vitamin
Fat soluble vitamins (Vitamins A, D, E and K).
Each vitamin subserves particular function in the
physiology of human body. Therefore, deficiency of one or more vitamins
leads to specific deficiency diseases. For some vitamins (e.g. Vitamin
E), no deficiency disease is yet known.