The body already produces enough protein to get by just fine. However, many people think athletes "use up" too much protein and faster than they gain it back, but that is not true because the body regulates homeostasis. I hope I helped :)
i would say c, because many people are in need for new livers, kidneys, etc, and it does save a lot of lives per year
Different , symptoms , yep those should work
Life goal? Make a chart, or have some type of meter that watches your steps.
I don't really understand this question..