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Body's internal systems regulate eating behavior
The body has various hormonal and physical mechanisms that tell us to stop eating, such as stomach stretch receptors that signal the brain to stop eating when the stomach is full, and hormones like peptide YY and cholocystokinin that are activated by protein and dietary fat, respectively, to also signal the body to stop eating. These systems serve as powerful regulators of eating behavior, preventing individuals from continuously overeating. This is evident in the wild, where animals do not become obese due to the effective operation of these internal mechanisms.