The formal discovery of vitamins revealed that the body requires these essential organic substances in minute amount to perform a highly specific metabolic function:
2.serve as basic building units for another compound.
3.contribute substantially to the body’s mass.
Vitamins’ Role in the Body
Vitamins contain no useful energy for the body; instead, they link and regulate the sequence of metabolic reactions that release energy within food molecules. They also play an intimate role in tissue synthesis and other biologic processes. A vitamin participates repeatedly in metabolic reactions regardless of the person’s physical activity level. This means that the vitamin needs of athletes do not exceed those of sedentary counterparts.
The important biologic functions of vitamins in the body mention below:
Individuals who expend considerable energy exercising need not consume special foods or supplements that increase the diet’s vitamin content above established requirements. Also, at high levels of daily physical activity, food intake usually increases to sustain the added energy requirements of exercise. Additional food consumed through a variety of nutritious meals proportionately increases vitamin and mineral intake. This general rule has several possible exceptions.
First, vitamin C and folic acid exist in foods that usually comprise only a small part of most Americans’ total caloric intake; the availability of these foods also varies by season. Second, some athletic groups consume relatively low amounts of vitamins B1 and B6. An adequate intake of these two vitamins occurs if the daily diet contains fresh fruit, grains, and uncooked or steamed vegetables. Individuals on meatless diets should consume a small amount of milk, milk products, or eggs (or a vitamin supplement) because only foods of animal origin contain vitamin B12.
Classification of vitamins
Vitamins are classified as fat-soluble or water-soluble
1.fat soluble vitamins
This type of vitamins dissolve and store in the body’s fatty tissues and do not require daily intake. Dietary lipid provides the source of fat-soluble vitamins, whereas the liver stores vitamin A,D and K, vitamin E Distributes throughout the body’s fatty tissues.fat-soluble vitamins are mention below:
2.water soluble vitamins
Water-soluble vitamins disperse in the body fluid without appreciable storage with the excess voided in urine. vitamin C and B complex group constitute the nine water-soluble vitamins. They largely act as a coenzyme.
Water-soluble vitamins are mention below: