your body uses protein to build and repair tissues.
you also use protein to make enzymes and hormones and other body chemicals and that is the reason that protein is important and beneficial to us humans.
epidemics of leprosy, plague, syphilis, smallpox, cholera, yellow fever, typhoid fever, and other infectious diseases were the norm.
•food gives us the energy to grow and to develop.
(note: i'll be continuing answer this later)