The maintenance of a correct water balance (the net difference between water gain and water losses) is essential to good health.
It is all the more essential as there is no real water storage in the body: the water we lose needs be replaced, and humans cannot survive more than a few days without water.1,2
We lose water on a daily basis.
- Through the respiratory tract (by breathing)
- Through the gastro-intestinal tract (faeces)
- Through the skin (perspiration and sweating)
- Through the kidneys (urine excretion)
Lifestyle and environmental conditions have a significant impact on an individual’s own level of water loss, but on average, a typical adult loses about 2.6 litres (L) per day.3