VitamIt must be a vital, organic dietary substance, which is neither a carbohydrate, fat, protein or mineral and is necessary in only very small amount to perform a specific metabolic function.
It cannot be manufactured by the body and therefore must be supplied by the diet.
Vitamins participate in many metabolic reactions in the body which take place as
food is being utilized. The fat soluble vitamins act as a regulator of specific
metabolic activity and the water soluble vitamins function as coenzymes.
Coenzymes combine with a protein to form enzymes which promote, release and
utilization of energy. The energy comes from mainly carbohydrate, fat, and
protein respectively but not from the vitamins.
The Recommended Dietary Allowances (RDA) provides scientific and accurate
information on Vitamins are easily lost from the food sources. Some vitamin loss
occurs when the food is harvested. Modern method of harvesting, storage,
transportation, processing and preparation minimizes these losses. Vitamin loss
occurs by oxidation, by light, by heat, by exposure to acids and alkali and by
leaching onto water.