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People about to have surgery must tell their health care providers about all supplements they take.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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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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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.