Vitamins and supplements like melatonin and fish oil offer health benefits but can cause side effects if misused. Learn about the impact of saw palmetto on blood pressure and find the best multivitamins for young women and adults over 50.
The muscular tongue functions in chewing, tasting and swallowing. Because of its nearly continuous use throughout the day, abnormalities become obvious very quickly, making the tongue a helpful marker of disease.
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Potassium, an electrolyte, plays many important roles in the body. The heart, in particular, relies on potassium for critical functions. Transmission of chemical "messages" in muscle and nerve fibers also requires potassium.
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Before the days of biopsies, CT scans and near-instant laboratory tests, doctors relied more on outward signs of disease to arrive at a diagnosis. A thorough history and careful physical exam provided the only clues to disease for early physicians.
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