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The average adult has about 21 square feet of skin.
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Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.
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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.