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Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
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Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.
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People about to have surgery must tell their health care providers about all supplements they take.
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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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In 1864, the first barbiturate (barbituric acid) was synthesized.