VITAMINS • Vitamins are natural substances found in plants and animals and known as Essential nutrients for human beings. • The name vitamin is obtained from "vital amines" as it was originally thought that these substances were all amines. • Human body uses these substances to stay healthy and support its many functions. • There are two types of vitamins: water-soluble and fat-soluble.
Cont. • The fat-soluble vitamins include vitamins A, D, E and K • The body needs vitamins to stay healthy and a varied diet usually gives you all the vitamins you need. • Vitamins do not provide energy (calories) directly, but they do help regulate energy-producing processes. With the exception of vitamin D and K, vitamins cannot be synthesized by the human body and must be obtained from the diet. • Vitamins have to come from food because they are not manufactured or formed by the body.
Characteristics of the vitamins are: • Most of the vitamins have been artificially synthesized. • Some of vitamins are soluble in water and others are fat-soluble. • Some vitamins are synthesized in the body. Some members of vitamin B complex are synthesized by microorganisms in the intestinal tract. • Vitamins are partly destroyed and are partly excreted. • Vitamins can be stored in the body to some extent, for example the fat-soluble vitamins are stored in the liver and subcutaneous tissue. • Vitamins can perform their work in very small quantities. Hence, the total daily requirement is usually very small.
CONCLUSION • There are 13 essential vitamins and each one has a special role to play within the body, helping to regulate the processes such as cell growth and repair, reproduction and digestion • Vitamins can perform their work in very small quantities. Hence, the total daily requirement is usually very small.