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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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There are 20 feet of blood vessels in each square inch of human skin.
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According to animal studies, the typical American diet is damaging to the liver and may result in allergies, low energy, digestive problems, and a lack of ability to detoxify harmful substances.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.