Water makes up roughly 60-70% of the human body, and the fluid leaves your system constantly through breathing, sweating and urine. So, knowing how much water to drink daily isn't just about thirst.

Drinking water in the morning can help improve alertness and weight management, as well as heart, metabolic, kidney, and skin ...

Hydrate or die, warned Camelbak, the American water-pouch-in-a-backpack company, some years after it was founded in 1989. Water is necessary for survival, but how do we know when we’re getting enough, ...