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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.
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IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.