The world’s top food companies and farmers of crops such as beet sugar are pitted against each other as they lobby the U.S. government over plans to label genetically engineered ingredients. At the heart of the issue is transparency over ingredients used in food. Packaged foods makers are facing flagging consumer trust and stagnating demand for some core products as consumers opt for foods with simpler ingredient lists. Many food companies want the government to require manufacturers to include on labels all ingredients that have been genetically modified, known as GMO. But farmers want the labels to exclude ingredients that have been so refined and processed that they no longer contain any trace of the transformed genes when they are used for food. “The law has been very clear that the required disclosure is going to be for those crops or ingredients that contain the genetic material,” said Luther Markwart, head of the American Sugar Beets Association in Washington. The entire U.S. sugar-beet crops is genetically engineered. “For things like sugar and other refined products that don’t contain the genetic material, the law does not apply to us,” Markwart said. But Nestle, which makes Stouffer’s frozen prepared foods and Lean Cuisine frozen entrees, and Hershey, whose confections include Reese’s Peanut Butter cups, disagree. “Consumers want to know what is in their food and beverages and we believe that they deserve transparency. It’s at the core of our business,” Nestle spokeswoman Kate Shaw said in an emailed statement, noting the company believes those highly refined ingredients should fall under the requirements. Hershey’s global head of scientific and regulatory affairs, Martin Slayne, said labeling these ingredients is both important for consistency as well as for “meeting consumer expectations on transparency.”