Nutrition Science and Everyday Application - beta v 0.1

Introduction to Protein
Protein makes up approximately 20 percent of the human body and is present in every
single cell. The word protein is a Greek word, meaning “of utmost importance.” Proteins are
called the workhorses of life as they provide the body with structure and perform a vast
array of functions. You can stand, walk, run, skate, swim, and more because of your proteinrich
muscles. Protein is necessary for proper immune system function, digestion, and hair
and nail growth, and is involved in numerous other body functions. In fact, it is estimated
that more than one hundred thousand different proteins exist within the human body. In
this lesson you will learn about the structure of protein, the important roles that protein
serves within the body, how the body uses protein, the risks and consequences associated
with too much or too little protein, and where to find healthy sources of it in your diet.
Unit Learning Objectives
After completing this unit, you should be able to:
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