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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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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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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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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.