Water & the human body

There is no universal number, the eight-glasses rule has no evidential basis, and the reference values people quote include the water in food.

The diseases water carries, why chlorination was the most consequential public health intervention of the twentieth century, and what remains unsolved.

Roughly 55 to 60% of an adult is water, but the figure varies more between individuals than most people expect — and body composition matters more than body size.