The word “protein” comes from a Greek word that means “of prime importance.” Proteins help us see, contract our muscles, and clot blood. Our organs and immune system are made up of mostly protein. Learn what a protein is and the foods that provide it, how our bodies process protein, the difference between high and low quality proteins, and the recommended intakes of this essential nutrient. Learn: – Why humans are “protein vampires.” – What are amino acids and why are they so crucial? – What is complete and incomplete protein? – How do we use protein? – What is the difference between animal and vegetable protein? – How do cows and carrots become people?