Food can be defined as anything solid or liquid which when swallowed, digested and assimilated in the body keeps it well, like air and water. Food is also basic to our existence. In fact, food is the primary concern of man in his physical environment throughout all recorded history. People can live without food for a few days but no one can live without food forever. If a person does not eat food then food stored in the body is consumed and the energy is obtained. Due to which body becomes weak and diseased.
Thus to keep body active, disease-free and strong, a person should take a proper and nutritionally sound diet daily.
Many chemical elements are present in food. They die called nutrients. These nutrients are provided by food and thus food is essential to keep body active and fit. These nutrients include carbohydrates, proteins, fats, minerals, vitamins and water. But these nutrients should be present in a definite ratio to provide energy for the various activities of body.
Food and Nutrition
Growing children need energy than aged people. The main energy giving nutrient is carbohydrate. Carbohydrates are present in the form of glucose and starch in the body to provide energy.
Sources of Glucose. Sugar, jaggery, honey etc.
Sources of Starch. Different cereals like flour, suji, maida, rice, maize, jowar, bajra etc. Root vegetables like potatoes, raw fruits, banana etc.
4 calories of energy are provided by per gram of carbohydrates.
The other energy giving food is fat. 9 calories of energy are provided by 1 gram of fat. Thus labourers should take more fat in their diet. Sources of Fat. Oil, ghee, butter, cream, dry fruits, etc. are main sources of fat. Major part of energy is obtained by carbohydrates as they are easily digestible. Protein also acts as a source of energy to the body. 1 gm of protein provides 4 calories. But the main function of protein is to act as a body building food so carbohydrates act as main energy providing food sources.
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