What is Protein?

Thursday 14 November 2013

Protein is the major component of body tissues. It is the essential nutrient for growth. Protein is made up of 20 amino acids and has three-dimensional structure. Protein is important in making antibodies, enzymes, hormones, muscles and protein transporters. Examples of food that contain all essential amino acids are meat, poultry, eggs and most of dairy products. Nuts and legumes are high sources of plant protein.

However, most of plant protein lack of certain amino acids. Thus, they are incomplete protein except for soy and soy products. The protein requirement for normal people is 15 to 20 percent of total calorie. If people have chronic kidney disease, the protein requirement should be reduced in order to delay the progression of kidney failure. Protein supplements are not encouraged if people can get enough protein from food. For certain cases, for instances in pregnancy and serious illness, they have to increase protein requirement. High protein intakes have also been implicated in chronic diseases such as cancer, renal insufficiency, renal stones, osteoporosis, coronary heart disease, and obesity. Thus, try to deal with dietitians and ask them the actual amount of protein that you should take everyday. Believe me, they will help you.

Sources :
About.com NUTRITION 
About.com BIOLOGY
RNI Malaysia

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