I’ve heard people say it is because of a brain signal but I’m not sure.
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Once Upon A Time, people starved to death a lot.
Sugar is a sign of a calorie-dense food which your body can very easily break down for energy.
Your brain makes sugar desirable so that you seek out more of those calories.
Salt is also necessary to stay alive, yes. But your brain is *far* more concerned with preventing you from starving to death, so it gives you *much more* of a drive to see out sugar.
It’s true that most people nowadays have ample access to calories and aren’t at risk of starving to death…but you haven’t evolved to deal with that. You’ve evolved to deal with constant starvation, so that’s still how you’re wired today.
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