Proteins are essential nutrients of the human body. The word ‘protein’ has been etymologically derived from the Greek word ‘protos’ meaning ‘first.’ A protein molecule is actually a chain of amino acids, the building blocks that are made up of carbon, hydrogen, and oxygen along with a nitrogen (amino) group. Proteins are present practically everywhere in the human body – in the blood, muscles, hair, nails, and bones. Guess what? Even your hormones, enzymes, neurotransmitters, and antibodies are all made up of proteins. In fact, the DNA and RNA in each and every cell of your body have nucleoproteins...again proteins.