DEAR DOCTOR K: I'm in my 80s. At my last checkup, my doctor emphasized how important it is to stay hydrated. Can you explain why?
DEAR READER: Drinking fluids is crucial to staying healthy and maintaining the function of every system in your body. That includes your heart, brain and muscles. Among other things, fluids carry nutrients to your cells. They flush urine and bowel movements, both of which contain body wastes, out of your body. If you don't drink enough fluids, you run the risk of dehydration.
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