South Dakota-based meat processor Beef Products Inc. shows a sample of its lean, finely textured beef in September 2012. AP hide caption

itoggle caption AP

Lean, finely textured beef, dubbed "pink slime" by critics, is frozen on a large drum as part of its manufacturing process at the Beef Products Inc.'s plant in S. Sioux City, Neb. in March. Nati Harnik/AP hide caption

itoggle caption Nati Harnik/AP