Sixty seconds on . . . hydration

I know this one—eight glasses of water a day, right?Not exactly. New research in Science shows the recommended intake of two litres, or eight glasses of water, a day is too high for most people.1Wat-er you talking about?Scientists assessed the water intake of 5604 men and women aged between 8 days and 96 years old from 23 countries. The research involved people drinking a glass of water in which some of the hydrogen atoms were replaced by deuterium, a stable isotope, to show how quickly the body processes water. This was found to be higher in hot and humid environments and at high altitudes, as well as among athletes, pregnant and breastfeeding women, and people with high levels of physical activity.So should I throw away my £60 smart Bluetooth rehydration system?Do you mean water bottle? Not quite yet. Most people only require about 1.5 to 1.8 litres a day, the…
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