When we haven’t eaten for a while, our brain starts to run low on glucose. This can make our brain feel stressed and irritable, much like how a car might start sputtering if it’s running out of gas. Back in ancient times, this anger and irritability may have helped our ancestors become more focused and motivated to find food. Feeling hangry (hungry and angry) could have made them go “f**k this, ill do it myself” in terms of hunting or gathering food, increasing their chances of survival.
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