To better understand what a balanced diet, start with the word “diet” for short. Power is defined as the food consumed by a human being or group of human beings, considered (s) as a whole, as opposed to sub-division of foods into proteins, carbohydrates, lipids or individual items as meat, fruits, vegetables, etc.
Food is necessary to produce energy to keep body heat in order to work, and to provide essential substances (such as proteins, minerals, vitamins, etc..) That are important for growth, tissue repair and reproduction, etc. The proteins, in combination with minerals, are the main source of materials needed to repair and ensure the healthy growth of the body.
Vitamins are needed to assist various physical and chemical mechanisms that make up the life of body cells (about 17 vitamins are deemed necessary in this task, although the action of some of them are still unclear). The water, brought the body with food, does not just entering the body fluid composition, but is also an essential part of body cells. Water can also help detoxify the body.
Oxygen is necessary to convert ingested food into energy. The human body is similar to the internal combustion engine in which gasoline between before being mixed with oxygen and to be converted into energy and heat production. The chemical potential energy contained in food is converted, with the aid of oxygen, heat. Body temperature is maintained at a constant level and any excess heat is relieved through the mechanism of regulation of body heat that operates primarily through the skin.
The energy value of food is expressed in terms of the amount of heat they produce combustion. In scientific work in general, heat is measured in calories, one calorie is the amount of heat required to raise one gram of water one degree Celsius. However, considering the energy value of foods, it is more common to operate a 1000 times greater, the “large calorie” or “kilogram calorie” (commonly known as Cal or kcal / kg, although in daily use Everyone uses the word “calorie” to mean the same thing).
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