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Eight glasses of water a day may be unhealthy, scientists warn, as doctors reveal cause of Bruce Lee’s death

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Drinking the recommended eight glasses of water a day may be too high for our actual needs, according to scientists.

Given around half of our daily intake of water comes from food, researchers estimate we only really need around 1.3 to 1.8 liters a day rather than the recommended two liters.

Previous studies depended on data from small samples of people, but more than 90 scientists across the world have now collaborated to measure water turnover using a different technique.

They surveyed 5,604 people aged between eight days and 96 years old from 23 countries. Participants drank a measured amount of water enriched with the element deuterium, which is found naturally in the human body and is completely harmless.

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