Have a glass of water while you read about hydration:

Our bodies can live up to a month without food, but less than 7 days without water.

If you are drinking enough water, you should be urinating between one to two litres of urine a day. When you feel thirsty that’s a sign you are already starting to get dehydrated.

Being dehydrated can leave you feeling tired, impact physical performance and make it difficult to concentrate.

Mild dehydration is easily remedied by drinking some water, but losing a large amount of water (10% of your body weight) can be life-threatening, especially in the elderly and small children.

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