What Causes ‘Hunger’ in the Body?

Your body sends out messages when it needs food, like a tiny robot inside you saying, 'Hey, I need more energy!' This happens because your brain gets a signal from your stomach and blood sugar levels. When those signals go up, you feel hungry and want to eat.

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Examples

You feel hungry when you've been waiting a long time between meals because your stomach is telling your brain it needs food.
Your body signals hunger if you skip breakfast and then try to focus on school work.
If you eat a big meal, your brain might not signal hunger for several hours.

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Categories: Biology · hunger,biology,body signals