Sandwich chain Subway has announced plans to drop the additive azodicarbonamide from its fresh-baked breads. Above, Subway founder Fred DeLuca poses carrying bread for sandwiches. Jonathan Nackstrand /AFP/Getty Images hide caption

itoggle caption Jonathan Nackstrand /AFP/Getty Images

A man buys meat at a butcher's stand in Moscow's Dorogomilovsky market in 2011. On Monday, Russia began blocking U.S. meat imports until those imports are ractopamine-free. Natalia Kolesnikova/AFP/Getty Images hide caption

itoggle caption Natalia Kolesnikova/AFP/Getty Images

A photo from 2009 shows "All Natural" Necco Wafers. But after customers rejected the changes, the Massachusetts company returned to its original recipe.

Charles Krupa/AP hide caption

itoggle caption Charles Krupa/AP

Lazy Cakes, now sold as Lazy Larry, contain melatonin. The Food and Drug Administration says that ingredient, which helps regulate sleep, is not an approved additive for food. herbalcity.com/lazycakes hide caption

itoggle caption herbalcity.com/lazycakes