what actually cases the pain that comes with being hungry?
In: Biology
The physical sensation of hunger comes from the contraction of the stomach muscles. They are triggered by the hormone ghrelin – also known as the hunger hormone. Ghrelin is known to be rise after a period of not eating and once the individual is fed, ghrelin levels start to drop to their lower levels. Until you get hungry again.
Check the [Ghrelin](https://en.wikipedia.org/wiki/Ghrelin) wikipedia for some more info.
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