Page 120 - The Manga Guide to Biochemistry

2. Biochemistry of Obesity—Why Is Fat Stored?

The next mystery is one that I
really worry about!

2. Why do you gain weight
if you overeat?

Being significantly All right! Let's
overweight is actually talk about what

a medical condition obesity means
called obesity. biochemically.

Um...

To put it simply,
to be obese means
that an excess of
fat has been stored

in your body.

Ingested and Expended Energy

When saccharides, 1 mole of ATP
lipids, and proteins molecules contains
are ingested, energy
approximately
(ATP) is created 7.3 kcal of energy.
from them.
Lipid

Protein saccha­ride The total energy that
106 Chapter 3 is created from the

saccharides, lipids, and
proteins that were eaten* is
called the ingested energy.

* More accurately, since some of these particles of food are directly excreted
after they are eaten, ingested energy is the total energy that is created from
the saccharides, lipids, and proteins that were actually absorbed by the body.