Some days it feels like you can eat the whole pizza by
yourself. Other days, you take only a few bites of your food and you
feel nauseous. Your appetite can seem unpredictable at times, and it can
lead you to go hungry, trying to resist cravings, or feel weak because
it seems you just can’t keep anything down.
What is it
that controls our appetite? Why does it change so much from one day to
the next? Is there anything we can do to help make it more predictable?
In normal circumstances, hireling goes up right before we eat,
triggering a feeling of hunger. The same also happens when you go longer
without eating than normal.
After we eat, it normally goes
down for about three hours after we eat, when out stomach is distended.
At this point, lepton tells our brain we have enough energy stores, and
our appetite decreases.
But then, you might be thinking, why do overweight and obese people often have a tendency to have big appetites?
Research
suggests that our body can build resistance to the effects of lepton
over time, if we don’t respond to the appetite suppressing effects like
we should. This could be due to the second element that affects
appetite: cues.
Cues trigger learned responses through habit. If
we get used to eating lunch as soon as the warm midday sun shines
through the windows onto our desk, even if we just ate breakfast, we
will start to feel hungry when we see the sun hits our paperweight.
Other
cues include smells or sounds, which, when they are really well ingrained in our minds, can even cause us salivate even if food is
nowhere to be seen.
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