This strikes me as something constantly asserted but never proven. It should be pretty trivial to find out if this is the case, medically, so there should be data. I went ahead and searched around and although I see a lot of headlines about it, there is a lack of definitive corroboration. I found these sources:
"According to the lay press, 75% of Americans are chronically dehydrated. While this is not supported by medical literature, dehydration is common in elderly patients."[0]
" In fact, scientific studies suggest that you already get enough liquid from what you're drinking and eating on a daily basis. We are not all walking around in a state of dehydration."[1]
"The notion that there is widespread dehydration has no basis in medical fact"[1]
This strikes me as something constantly asserted but never proven. It should be pretty trivial to find out if this is the case, medically, so there should be data. I went ahead and searched around and although I see a lot of headlines about it, there is a lack of definitive corroboration. I found these sources:
"According to the lay press, 75% of Americans are chronically dehydrated. While this is not supported by medical literature, dehydration is common in elderly patients."[0]
" In fact, scientific studies suggest that you already get enough liquid from what you're drinking and eating on a daily basis. We are not all walking around in a state of dehydration."[1]
"The notion that there is widespread dehydration has no basis in medical fact"[1]
[0] https://www.ncbi.nlm.nih.gov/books/NBK555956/ [1] https://www.snopes.com/fact-check/water-works-2/