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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The superglue developed by scientists sticks to wet, bloody surfaces. Researchers hope the adhesive could one day seal a torn vessels or fix heart defects. Randal McKenzie / McKenzie Illustrations. hide caption

itoggle caption Randal McKenzie / McKenzie Illustrations.

Martine Rothblatt, CEO of United Therapeutics, is the namesake of the company's latest drug, Orenitram. Ron Levine/Getty Images hide caption

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Some people with only slightly elevated blood pressure might be able to relax a bit, if they're doctors go along new treatment guidelines. iStockphoto hide caption

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