We're all familiar with the old adage: Drink eight glasses of water at 8 ounces each every day ... and you should replace lost water (and electrolytes) through fluid intake.

If you’re drinking eight eight-ounce cups of water a day you’re doing well, but you could likely benefit from some adjustments. © 2024 Fortune Media IP Limited ...

urine and even our breath means that we must make sure we keep up with our fluid intake. But just how many litres of water ...