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Nutritive value of foods (Proteins (LBV (low biological value): proteins…
Nutritive value of foods
Fats
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Unsaturated: some of the hydrogens are joined with other by double bonds and it is not completely saturated
Saturated: all the carbon atoms are saturated with hydrogen atoms and cannot accept anymore carbons. 
Carbohydrates
Functions: main source of energy. acts as a "protein sparer" so that protein can be used for its main function and not to provide energy.
contains 3 elements: Carbon, Hydrogen & Oxygen (CHO)
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Proteins
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Function: Growth, repair and maintenance
Protein complementation: the mixing of two types of protein sources to get full range of amino acids
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Different needs of proteins: babies and children: rapidly growth. adolescents: rapid spurt growth. pregnant women: take care of growing baby. nursing mother: milk production