- Feb 14, 1988 (Age: 30)
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The human body is actually a living machine and like all other machines. The living machine requires fuel to supply with energy. The fuel provided by the food we eat. But we know how much we need to stay healthy? The energy value of the food is usually measured in calories. Calorie is the amount of heat http://www.tunasotomotif.com/ required to raise the temperature of 1 kg of water by 1 degree c. the number of calories that people need per day varies. This depends on the activities of those who engage in as an example, people will need more calories to stand rather than sit, people require more to run than to walk, etc. provided by food energy in the form of three kinds of chemical substances. They are carbohydrates, proteins and fats. Carbohydrates provide 8.8 calories per gram (CAL/gm) energy, protein 4.0 CAL/gram and fat 8.0 CAL/gm. each food contains different proportions of substances.These three chemical substance is all important for the body stay healthy.