Why Dehydration, Not Hunger, Is the Real Risk of a 25-Hour Fast
A healthy adult can go weeks without food, but only hours without water — and in a hot climate, that gap narrows fast. This episode walks through the clinical stages of dehydration, from the mild thirst band everyone mistakes for a normal fast-day feeling, to the standing dizziness that marks the turn, to the confusion and fainting that mean it's a medical emergency. It also covers the research finding that surprised us most: in older adults, thirst becomes an unreliable signal, sometimes inverting entirely, which means monitoring has to be external — urine color, standing safely, cognitive…
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