alt Hacker NewsAre we sure this is not just harmless and arbitrary information being parroted? Do we have verifiable sources other that anecdote? I find it hard to believe that there is just a single value for water intake across the massive biological spectrum that is humanity and expect to see a range when this conversation comes up. You're also getting water from foods, which I am sure is not being accounted for. Reminds me of the 10k steps a day that just happened to be "correct enough" to be believed and acted on. The truth is much more nuanced and depends on a number of factors in a person's physical health.
Without concrete verifiable findings, the best we can do is learn to pay attention to our bodies and drink maybe a little bit more water than we think we need to.
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I’ve always been extremely suspicious of constant water consumption. No other mammal seems to do this. Even the ones that require a lot of water like horses will only drink when they’re thirsty or while eating.
Overdrinking water is an American mania. You don't need to drink 3 liters.
https://abcnews.com/Health/Wellness/waterlogged-america-drin...
The European doctor quoted certainly said "3 liters" from both drinks and food (especially vegetables). In Europe I think we drink between 1 and 2 liters per day in actual water, depending on how dry the weather is.