In this course, I'll refer back to the 
idea that we are what we eat. 
When we stop and think about the science 
of nutrition, we find this is literally 
true. 
Human beings are a very diverse species. 
But all humanbeings, young and old, male 
and female, of all cultures and 
ethnicities, have to eat. 
Specifically what, how, and why we eat 
may differ, but, at a microscopic level, 
the food we eat, is all made up, of 
chemical elements. 
Carbon, Hydrogen, Nitrogen, Calcium, 
Phosphorous, Sodium, all found right on 
the periodic table. 
So in a sense, food is chemistry, healing 
a bio-chemical organism. 
The foods we choose to eat may look 
different, taste different, provide 
different nutrients. 
And be more or less healthful, but 
whether animal or plant in origin, Our 
food is comprised, of tissues, cells, 
chemical compounds, and elements. 
These tissues, cells, chemical compounds, 
and elements, are broken down by our 
bodies metabolic processes, to be 
utilized in building new cells Tissues, 
synthesizing enzyme hormones, generating 
energy, or, maybe stored, or eliminated 
completely. 
During growth and development, as well as 
through adulthood, you need to eat to 
provide new metabolic resources. 
So next time you sit down to eat, or grab 
a bite running from a to b Think about 
how what you're eating, may become a 
piece of you. 
The quality of your food, will be 
reflected in your body, and the quality 
of your fuel, will impact how well your 
body functions. 
As this course continues, you'll learn 
just how differently your body may grow, 
develop, or function, depending on what 
you eat.