Water is necessary for optimal metabolism. One study found that adding 1.5 liters of water to the usual daily intake reduced average weight and body mass index in a group of overweight women aged 18 to 23 years. If you are even mildly dehydrated, your metabolism may slow down.
Another study found that adults who drank eight or more glasses of water a day burned more calories than those who drank four. To stay hydrated, drink a glass of water before every meal and snack. Also, add fresh fruits and vegetables to your diet as they naturally contain water.
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