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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
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People about to have surgery must tell their health care providers about all supplements they take.
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More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.
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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.