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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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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.
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The familiar sounds of your heart are made by the heart's valves as they open and close.