In a nation where water bottles are a common accessory, a surprising reality persists: most Americans live in a state of ...

This is thirst—a sensation of dryness in the mouth signaling we need to have a drink. This basic physiological mechanism is controlled mainly by part of the brain's "control center," called the ...

Hew-Butler and a team of colleagues conducted a study to find out just how well the body's thirst mechanism for salt works. They analyzed five years of research on ultra-marathon runners in ...