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  • There's a time in every person's life when drinking water is deadly.


  • Even as much as a few ounces is enough to kill.


  • The average healthy adult is made up of 55 to 60% water.

    一般健康的成人由 55% 到 60% 的水組成。

  • The average baby, on the other hand, is roughly 75% water.

    另一方面,一般的嬰兒由大約 75% 的水組成。

  • And that difference is why babies shouldn't drink water before they're at least six months old.


  • Not from the tap or a well or a spring.


  • Plain water is just plain off limits.


  • You see, everyone's kidneys have a limit to how much water they can handle.


  • Break that limit, and the excess water will back up into your bloodstream, where it dilutes the salt, or sodium, in your blood.


  • Once your blood dips below 0.4 ounces of sodium per gallon, you're at risk of a condition called Hyponatremia.

    一旦你每加侖的血液裡含鈉低於 0.4 盎司,你將會面臨得到低鈉血症的風險 。

  • It happens when your cells try to return sodium levels to normal by absorbing the extra water and swell up like a water balloon in the process,


  • causing complications like confusion, vomiting and muscle spasms.

    引起的併發症有意識模糊嘔吐以及肌肉痙攣 。

  • Hyponatremia is common in marathon runners who drink too much too fast during a race without also providing enough sodium to balance out their blood.


  • And if you keep drinking, that excess water will eventually reach the cells in your brain.


  • By this point, you have a dangerous case of water intoxication, which affects roughly 200,000 Americans each year.

    這時,你面臨一個危險的水中毒症狀,粗估每年約有 20 萬個美國人受到此症狀的影響。

  • It occurs when your brain cells swell, which builds up pressure inside your skull that can lead to seizures, brain damage, and, in severe cases, death.


  • But don't worry, dying from water intoxication is extremely hard for a fully-grown human.


  • An adult would have to drink 2.5 to 5 gallons every few hours to reach that point.

    一個成人必須每隔幾小時喝下 2.5 到 5 加侖的水才能夠達到致死的程度。

  • But for newborns, it's a different story.


  • Their kidneys are about half the size of an adult's, so they can't hold much water to begin with.


  • And it takes just a few ounces to cause problems.


  • On top of that, their kidneys aren't developed enough yet to properly filter water, so any water that enters their body ends up in the circulatory system,


  • where it dilutes their blood and increases their water content by 7 to 8%.

    稀釋他們的血液並增加他們水含量達 7-8 % 。

  • But it's not just drinking straight H2O that poses a threat.


  • In fact, most cases of water intoxication in infants don't even involve a glass of water.


  • A common mistake is when people dilute baby formula too much by accident, or when parents dunk their infants up and down in a swimming pool,


  • and in the process the infant gulps in too much water.


  • It's important that if your baby is showing signs of water intoxication that you take them to the hospital immediately,


  • where a doctor will likely provide some form of fluids like intravenous saline solution to bring the infant's sodium levels up to normal.


There's a time in every person's life when drinking water is deadly.


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