But, water turnover is not equal to the requirement for drinking water, says Professor John Speakman. "Even if a male in his 20s has a water turnover of on average of 4.2 litres per day, he does ...

More KucherAV/Getty Images "We really want to drink as much water as possible in the morning, ... So, drink a big glass of water in the morning can wake up your gut and detoxification organs." ...

"Drinking a couple glasses of water to allow the body to rehydrate allows for better digestion when you do eat. It also helps with moving the lower bowels for regularity in the mornings.