"Despite caffeine's many benefits, there's a belief out there that a daily coffee habit can cause dehydration."

"So is it true? Not according to the findings of a new study."

"Researchers at the University of Birmingham in the U.K. studied the fluid levels of 50 men who had a habit of consuming about three to six cups of coffee each day."

"With this kind of moderate coffee consumption, the authors conclude that "coffee ... provides similar hydrating qualities to water."

"To compare the hydrating effects of coffee directly with water, each participant completed two phases of the study. In one phase, they drank coffee as their main source of hydration. In the other phase, the participants went off coffee and drank equal amounts of water."