Does the water that we drink become blood? If so, how often?
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All of it, all the time. Water that you ingest makes its way through the GI tract, is absorbed across the lining of the intestines, and from there diffuses into surrounding small blood vessels. At that point it’s part of your total blood volume (and all other bodily fluids are in turn derived from blood). Any water that *doesn’t* take this route is going to be coming out the other end of the GI tract.
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