<s>[INST] Too much salt is bad for you. Why do salty foods taste so good? Why is it that most really good tasting things are not healthy? I really like vegetables, but I also like salted pretzels, Reese's peanut butter cups, and a bunch of other stuff that has no food value. Are humans just wired strange? [/INST] 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.</s>