NUTRITION
Nutrition is an important part of our life. We now
realize that quality of our health depends upon the nourishment that we provide
to our body. However, our dietary habits are influenced by many factors.
Factors influencing human nutrition are as follows:
1. Family
2. Age
3. Religion
4. Culture
5. Economic
status
6. Community
7. Tradition
8. Genetics
9. Medicine
10. Health
11. Agriculture
12. Technology
13. Science
14. Education
15. Climate
etc.
Most people eat what
they like or because it is a norm or out of habit. Their choice of food is not
influenced by the awareness of its nutritive value. Few people know the way
body utilizes food. It is also necessary to understand that a delicious dish is
not necessarily a nutritious one.
Nutrition is the
science of food and its interaction with an organism to promote and maintain
health. Thus, nutrition is combination of processes by which all parts of the
body receive and utilize the materials necessary for the performance of their
functions and for the growth and renewal of all the components.
Food is the substance
taken into the body that will help meet the body’s needs for energy,
maintenance of health, growth and reproduction.
Nutrition has been
defined as food at work in the body. Nutrition includes everything that happens
to food from the time it is eaten until it is used for various functions in the
body. Nutrients are components of food that are needed by the body in adequate
amounts in order to grow, reproduce and lead a normal, healthy life. Nutrients
include water, proteins, fats, carbohydrates, minerals and vitamins; hence the
plural form of these words has been used. Thus there are over 40 essential nutrients
supplied by food, which are used to produce literally thousands of substances
necessary for life and physical fitness.
Adequate, optimum and
good nutrition are expressions used to indicate that the supply of the
essential nutrients is correct in amount and proportion. It also implies
that the utilization of such nutrients
in the body is such that the highest level of physical and mental health is
maintained throughout the life-cycle.
Optimum nutrition means
that a person is receiving and utilizing essential nutrients in proper
proportions as required by the body while also providing a ‘reserve’.
Nutritional status is
the condition of the body as it relates to consumption and utilization of food.
The nutritional status of a person may be either good or poor.
Good nutritional status
refers to the intake of a well-balanced diet, which supplies all the essential
nutrients to meet the body’s requirements. Such a person may be said to be receiving optimum
nutrition.
Poor nutritional status
refers to an inadequate or even excessive intake or poor utilization of the
nutrients to meet the body’s requirements. Overeating can also result in poor
nutritional status of a person.
Malnutrition refers to
the physical effects on the human body of a dietary intake may be defined as
1.2 x BMR. The BMR (Basel metabolic Rate) is the minimum energy expenditure
necessary for body maintenance at rest with no physical activity.
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