Now I know how long water takes to filter through our bodies

Discussion in 'Lighter Life Forum' started by miss jelly tot, 13 May 2009 Social URL.

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  1. miss jelly tot

    miss jelly tot CWP Consultant

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    Hi everyone Im a CD girl but thought I would post this over on the LL board too for anyone who is interested, especailly on WI day;)

    How long does it take for a litre of water to go through our bodies?

    Very interesting question.

    The short answer is that for normal people it should take about 2 to 3
    hours. There is an easy way to find out. Drink a litre of water, and see
    how long it takes for your rate of urine production to go up and then go
    back down.

    But it depends on several things.

    First, the water has to be absorbed. For example, if someone has really
    bad diarrhea or is vomiting, the fluid won't be absorbed.

    Second, it depends on what is in the water. If it is pure water rather
    than water with salt in it, the pure water will be excreted faster than
    salt water.

    Third, if someone is dehydrated, say, was playing soccer for two hours and
    sweated out two more litres water than he drank, the fluid would stay in
    his body and his rate of urine production will stay really low until he
    drinks more. And if one lost two litres of water and drinks three litres
    of water, it will take longer for the rate urine production to increase
    than if he is not dehydrated.

    Forth, it depends on the time of day. Usually, people's rate of urine
    production (assuming identical rate of intake of fluid, like if one has an
    IV) in the middle of the night and increases around the time he wakes up.

    Finally, it depends on the state of health of the person. IF a person has
    kidney disease, the urine production might not increase as much. ANd if a
    person has heart disease, the fluid may build up in his tissues instead of
    being excreted.

    The reference is a paper where students drank water in the morning and
    determined how long it took for the water to be excreted. In this paper,
    it looks like they urinated out about 400 or 500 ml of water over about 2
    hours, before the rate of urine production slowed down. For a liter of
    what is needed, it should take a little longer.
    Re: How long does it take for a litre of water to go through our body?
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  3. SexyBecks1

    SexyBecks1 is loving CWP xx

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    Cambridge Weight Plan - step 3
    What an interesting post. Thank you.
  4. iceycold

    iceycold Full Member

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    Lighter Life
    Having had to sit with athletes (and as it were guard them) until they do a drug test, - it takes forever after exercise.
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