(c) Importance of Vitamins for Human Body
A vitamin is an organic compound required by an organism as a vital nutrient in limited amounts. There are thirteen vitamins that a human body needs for health and fitness. These include four fat-soluble vitamins; A,D,E and K, and nine water soluble vitamins; 8 B vitamins and vitamin C. In his essay "The Vitamins", Dr. Kenneth Walker has beautifully described the role of various vitamins for human body.
Each vitamin has specific jobs. Vitamins A plays a really big part in body growth, immune system and eye-sight. Vitamin D is necessay for strong bones and E is indispensable for fertility. Vitamin K is the clot-master. B vitamins help human body to synthesize proteins and energy. Vitamin C helps to heal cuts and wounds. Thus vitamins play a significant role in keeping the human body healthy and fit.
Deficiency and excess of vitamins also affect human health. The dearth of vitamin A may lead to a curious condition of the eye called xerophthalmia. The lack of vitamin D can cause rickets. One of major causes of human infertility is the lack of vitamin E. Beri-beri and pellagra are caused by the scarcity of B vitamins. Similary high dose of some vitamins may make human body sick.
In short, for the fitness of human body an adequate quantity of vitamin is inevitable. If the vitamins are missing from human diet, then the supply of mere carbohydrates, proteins, fats and minerals fail to keep us in proper state of health. The writer also proscribes us to take vitamins in the form of tablets. We must get them from fresh vegetables, fruits, cereals and meat to keep our body robust.
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