Protein is found throughout the body—in muscle, bone, skin, hair, and virtually every other body part or tissue. It makes up the enzymes that power many chemical reactions and the hemoglobin that carries oxygen in your blood. At least 10,000 different proteins comprise to make you what you are and keep you that way.
Proteins are sometimes described as long necklaces with differently shaped beads. Each bead is a small amino acid. These amino acids can join together to make thousands of different proteins. Scientists have found many different amino acids in protein, but 22 of them
are vital to the human body.
Of these 22 amino acids, your body can generate 13 of them without much effort. However in order to generate other 9 your body requires protein-rich foods. These 9 are called essential amino acids as they are essential for the proper working of the body.