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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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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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The average adult has about 21 square feet of skin.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.