This "wired" love for unhealthy food is inherited from our ancestors. Fat and sugar means large number of calories which can save you from starvation, and a lack of salt leads to life-threatening hyponatremia. However, foods high in these contents are difficult to obtain in prehistoric era, requiring good luck or large amount of work. So our ancestors had a strong love for these foods, which doesn't fade away though we can get them easily now, leading to the overeating problem.
This "wired" love for unhealthy food is inherited from our ancestors. Fat and sugar means large number of calories which can save you from starvation, and a lack of salt leads to life-threatening hyponatremia. However, foods high in these contents are difficult to obtain in prehistoric era, requiring good luck or large amount of work. So our ancestors had a strong love for these foods, which doesn't fade away though we can get them easily now, leading to the overeating problem.
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