Consuming anywhere from about 2,600 milligrams up to almost 5,000 milligrams of sodium per day is associated with more favorable health outcomes, according to a study. iStockphoto hide caption

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Nutrition researchers are reaching a new consensus: Cut back on all those refined carbs. And remember that some fat is good. Stacy Spensley/Flickr hide caption

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If new guidelines are followed fully, half the medicine chests in America could eventually be stocked with cholesterol-lowering drugs such as atorvastatin, the generic form of Lipitor. Bill Gallery/AP hide caption

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The rupture of a weakened portion of blood vessel (the dark blue spot in this brain scan of a 68-year-old woman) can prompt bleeding and death of brain tissue — a stroke. Simon Fraser/Science Source hide caption

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Exercise helps lower stroke risk, but birth control pills and pregnancy can be problematic for younger women. iStockphoto hide caption

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Even if you're under 25, you should still know your blood pressure, a study says. Rudyanto Wijaya/iStockphoto hide caption

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Some men take testosterone hoping to boost energy and libido, or to build strength. But at what risk? iStockphoto hide caption

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