“One of fallacies of the 8×8 rule is its stark over-simplification of how we as organisms respond to the environment we’re in,” says Rosenburg. “We ought to think of fluid requirement in the same way as energy requirement, where we talk about the temperature we’re in and level of physical activity were engaged in.”
In 2022, researchers from the University of Aberdeen estimated that the amount of water people need is between 1.5 and 1.8 litres per day, not the recommended two liters or eight glasses. They did this by collaborating with scientists from 23 different countries to measure the amount of water needed to keep people hydrated. They found…
