The word 'protein' is derived from the greek word 'Protias'. Its meaning is the best substance from foodstuffs. Protoplasm is formed by protein, which is the base of living cells. The maximum amount of protein is found is the tissues of our body. Besides this, protein is also found in blood, secretion of endocrine glands, bones, teeth and in delicate tissues. If water is extracted from our body, the maximum percentage of protein will be left behind in our body. Protein is a compound, which is formed by the combination of oxygen, carbon, hydrogen and nitrogen. Among energy producing food substances, protein is the only constituent in which chemical elements of nitrogen, phosphorus and sulphur are found. That is why protein is also called nitrogenous food. Our physical growth and development while be retarded, if we take less amount of protein in our food. Proteins promote cell growth and repair. Apart from this, protein also plays an important role in the mental development of an individual. Protein are also known as building blocks of life.
Sources Of Protein:
From the point of view of sources, protein can be divided into two categories.
1.Animal protein: Protein, which we get from animal products, is called animal protein. This protein is found in eggs, milk, milk products, meat, and fish. Egg is the best example of rich protein because sufficient amounts of amino acids are found in eggs.
2.Vegetables protein: Protein, which we get from vegetables, is called vegetable protein. Vegetable protein is usually found in various types of pulses and beans, soyabean, mustard, green peas, nuts, groundnuts, dry fruits and food grains.
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