Answer:
Your body needs nitrogen to make proteins in your muscles, skin, blood, hair, nails and DNA. You obtain nitrogen from protein-containing foods in your diet, according to the Royal Society of Chemistry. These foods include meat, fish, legumes, nuts, eggs, milk and other dairy products.
Explanation:
Your body needs the nitrogen in amino acids from protein foods to make other amino acids it uses to synthesize human proteins, according to Virtual Chembook at Elmhurst College. Not only do your various tissues contain protein, your metabolic processes depend upon enzymes, all of which consist of various kinds of proteins. The nucleic acid DNA, which makes up your genes, and RNA, which is involved in protein synthesis, also contain nitrogen.
