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TLDR summary: the high-school science summary of thirst regulation (by salt) is correct, but it's quite incomplete as a thirst regulation mechanism in general. In (recent) animal research, faster pathways have been identified, e.g. eating promotes thirst proportional to eating time, well before any salt-induced osmotic changes can affect thirst. Since the ...


No direct evidence that I could find insofar, but MSG seems to enhance the subjective "saltiness" perception of food as well: MSG+ soups were rated as more salty (F(1,34) = 26·26; P ≤ 0·001) and stronger tasting (F(1,34) = 12·57; P = 0·001) than MSG– soups There was no direct question about thirst or a measure of water consumed thereafter in that study, ...

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