When we need energy, can’t the body just burn the stored fat? Isn’t that the whole point of stored fat? Why will we feel hungry, weak, lightheaded, etc. at all? I understand if the body doesn’t have enough fat (if you’re super skinny), it would make sense to feel hungry, but I don’t understand why would that be the case if there’s enough fat to go around.
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I’ve fasted before and didn’t experience any of these symptoms except hunger. Some may be psychosomatic or leaned behaviors or your imagination. But whatever the case these experiences largely disappear after a few days without food . We are overfed and eat a lot of highly processed food too so sometimes we are artificially driving sugar levels up and down which can make you feel sick.
Also our bodies strive for balance. If you don’t eat food regularly you are not just missing calories , you are missing out on vitamins and minerals. You can adjust to much lower amounts of calories but you must still eat a certain amount of salt and other minerals. So your brain is trying to motivate you to find food. That can be very powerful. There are receptors throughout your brain that respond to various changes in what you eat, and they can make you act more aggressively more irrationally., and can even make you more willing to take risks
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