Proteins are required for the proper development of our body and the world protein means first in importance. They are conglomerates of phosphorus, sulfur, carbon, oxygen, nitrogen, etc. and a deficient supply of proteins to the body will couple the body to eat its own muscles so that all vital organs continue to function in a normal way. The main function of proteins is to grow, repair, and maintain the organs and tissues of the body. In order to facilitate the assimilation of proteins, the body releases amino acids which are more than 70 in number.
Enzymes break the proteins into amino acids which, in turn, help proteins to get absorbed into the bloodstream, out of 70 amino acids, 10 are considered essential for the purpose and such essential amino acids are known as high-quality proteins. Chief sources of proteins are milk, soybeans, almonds, nuts, milk, and coconut. Certain pulses, seeds, cereals, peas also contain protein but in a limited quantity, though their proteins also shell out good quality protein. Pulses augment the short supply of protein received from cereals. Hence, to get an added advantage, cereals should always be taken with pulses.
Our skin, muscles, hormones, and enzymes are composed of amino acids since their requirements are of permanent nature, so is the need for a constant supply of proteins. In the absence or short supply of proteins to the body, one is liable to feel tired and weak whereas their excess supply will vitiate our blood, as also let them rot in our intestines.
Daily requirement of protein of a person should be one gm per kg of the bodyweight but it may be ensured that the quality of protein is not inferior or sub-standard. For vegetarians, soybeans are capable of giving almost double the amount of protein with which an equal amount of fish can go.