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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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Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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The horizontal fraction bar was introduced by the Arabs.
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The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.