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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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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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Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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