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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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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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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.
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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.