Staci Moritz and her son Aidan, 11, play at a park in their neighborhood in Portland, Ore. Caring for three children and her injured husband exacerbated her health problems. Beth Nakamura for NPR hide caption

itoggle caption Beth Nakamura for NPR

Andreas Fhager, a biomedical engineer at the Chalmers University of Technology in Sweden, adjusts the Strokefinder device on a test subject's head. Gunilla Brocker hide caption

itoggle caption Gunilla Brocker

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

itoggle caption iStockphoto

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

itoggle caption Stacy Spensley/Flickr

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

itoggle caption Bill Gallery/AP