I get that our body needs water. But why does the thirst response almost always overestimates the amount of water our body actually needs, thereby leaving excess water that comes out as urine? How come our body doesn’t tell us to drink just the right amount of water that it needs? Why does yellow pee mean dehydration when the fact that there was enough excess water to produce urine means that you’re probably not dehydrated anymore?
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Urine isn’t excess water that your body didn’t need, it’s water that’s been used to carry out waste products your body doesn’t want. Your kidneys want the waste to be very diluted so they pull as much water as they can out of your bloodstream.
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