The salty suspects: Some 70 percent of the cheeses, soups, cold cuts and pizzas we buy at the grocery store exceed the Food and Drug Administration's "healthy" labeling standards for salt. Since we eat so much bread, it is — perhaps surprisingly — the top contributor of sodium to our diets. iStockphoto; Deborah Austin/Flickr; Beckman's Bakery/Flickr; iStockphoto; The Pizza Review/Flickr hide caption

itoggle caption iStockphoto; Deborah Austin/Flickr; Beckman's Bakery/Flickr; iStockphoto; The Pizza Review/Flickr

Farms outside Baghdad as seen from a U.S. Army Blackhawk helicopter. Much of Iraq's soil has a high salt content because of flooding and poor drainage. Jim Gordon/U.S. Army Corps of Engineers/Flickr hide caption

itoggle caption Jim Gordon/U.S. Army Corps of Engineers/Flickr

The work of harvesting salt, portrayed in the documentary My Name Is Salt, is difficult. But there's also a certain pride that comes with doing it well. Leafbird Films hide caption

itoggle caption Leafbird Films

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

An Israeli man bathes in the Dead Sea. Spas have long touted the health benefits of the Dead Sea. So does Naked Sea Salt. Sebastian Scheiner/AP hide caption

itoggle caption Sebastian Scheiner/AP

The Martha's Vineyard beach where Heidi Feldman collects saltwater to make sea salt. Courtesy of Heidi Feldman hide caption

itoggle caption Courtesy of Heidi Feldman

Keep the soy sauce on your food, and use it in moderation. Aaron Tam/AFP/Getty Images hide caption

itoggle caption Aaron Tam/AFP/Getty Images

Philadelphia is training owners of Chinese takeout restaurants to cut some of the salt in menu items like lo mein. Stephen Flood/Express-Times/Landov hide caption

itoggle caption Stephen Flood/Express-Times/Landov

Eat less salt, but not too much less. iStockPhoto.com hide caption

itoggle caption iStockPhoto.com

Food companies have begun quietly reducing salt in regular foods because low-salt items like these don't sell as well. Mel Evans/AP hide caption

itoggle caption Mel Evans/AP

Bali sea salt and a spoonful of Hawaiian red alae salt. Jim Noelker/AP hide caption

itoggle caption Jim Noelker/AP