What’s been your experience? If you’ve been eating too much
food or too many fattening foods, have you found yourself eating more and more
just to feel satisfied? If so, you’ve developed a tolerance, which means what
used to make you feel satisfied no longer does, and you need more just to get
you to what used to make you feel satisfied.
This is not only a behavioral experience, it is an
experience your brain is having as well. Dopamine, a chemical substance that is
released at the end of nerve fibers in the brain and transmits nerve signals
across the synapse, is reduced when overloaded by overeating. The reduction in
dopamine makes you feel less satisfied, and you have to increase what you eat
just to get that old satisfaction back.