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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.

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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

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Illicit drug use costs the United States approximately $181 billion every year.

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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).

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