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Factors That Influences Human Nutrition

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2. Theoretical backgrounds

2.1 Human body
Food, water and oxygen are life-sustaining substance essential to human life. Food provides both energy and the material needed for body cells. Nutrients are nourishing substances in food. These are needed for growth and development from childhood to entire life cycle for maintenance of body functions (Aguilera and Stanley, 1999). Food, water and oxygen are life-sustaining substance essential to human life. Nutrients are nourishing substances in food. These are needed for growth and development from childhood to entire life cycle for maintenance of body functions (Krishnaswamy and Sesikeran, 2010, p 1f).

2.1.1 Chemical composition of human body
The chemical composition of human body is exactly the ads that human eats every day, but none of the single food can supply all nutrients, the body needs. Chemical composition of human body is -
Molecule Mass %
Water 65 %
Other Inorganic 1.5 %
Lipid 12 %
Other Organic 0.4 %
Protein 20 %
RNA 1.0 %
DNA 0.1 %
Total 100 %

Source: (Freitas, R. A. Jr., 1998)

2.1.2 Factor influences human nutrition

FIGURE 2: Factor influences human nutrition Source: https://alison.com/courses/HUMAN-HEALTH-1-DIET-and-NUTRITION/content/scorm/1538/factors-that-affect-food-selection

2.2 Food
Food is basic requirement of all human being than

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