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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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People about to have surgery must tell their health care providers about all supplements they take.
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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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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.