It’s 　5　 to think that if a lack of water is bad for us then hydration(水合作用) must be 　6　.It surely protects our skin,helps us think,and 　7　 our risk of getting an illness.We are regularly advised to drink more water:it clears skin,helps us relax and keeps our 　8　,but could drinking too much water be 　9　? 

　　Drinking water doesn’t just come out of our taps 　10　.It’s sold to us by the same clever people that sell us yogurts that probably don’t do us much good.And these companies 　11　two to three liters of water per day.So is there any 　12　 to think it correct? 

　　The truth is this—people in 　13　 climates who are not doing too much physical exercise do need around six to eight cups of water per day but that can be 　14　 in food,alcohol or other drinks.There is no evidence that adding the eight cups of water to everything else we drink will do us any good and it 　15　 do us harm. 

　　But the great thing is that just like a top-level athlete,we don’t need to worry about exactly what that total daily requirement is 　16　 our bodies will sort it out for us.If we drink too much we pee (尿) it out.If we drink too little we get 　17　 and pee less.It’s all well-controlled in the same way as our 　18　 of oxygen is well-controlled. 

　　Saying that we should drink more water than our bodies 　19　 is like saying that we should consciously breathe more often than we feel like because if a little oxygen is good for us then more must be better.Like most things in life there’s a 　20　 amount—not too little and not too much. 

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