Proteins, the mainstay of our organism

Proteins are necessary for growth and repair of body tissues. Proteins perform a lot of metabolic and regulatory functions, such as nutrients assimilation, transport of oxygen and blood fats, the neutralization of toxic substances, etc.

The biological quality of a protein is measured according to the capacity to provide human beings with all the essential amino acids and the net protein contribution, which is how it can be assimilated by our organism so easily.



The amino acid profile

Proteins are made up of amino acids. There are twenty protein amino acids, eight of which are essential for human life, since they must be present in nutrition; these ones are the so called essential amino acids. The rest of the amino acids are synthesized by the organism from the essential ones.

If an essential amino acid is insufficient in the diet, this amino acid limits other amino acids being used to synthesize the protein.



Protein requirements:

The FAO / WHO / UNU (Food and Agriculture Organization / World Health Organization / United Nations Univer- sity) estimates the appropriate con- sumption of protein in adults at 0.8 g/kg for women and at 0,85 g/kg
for men
.

For instance, an adult woman who weighs 55 kg needs approximately 44 g protein per day, while an adult man weigthing 70 kg, needs approximately 59.5 g protein per day.

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