A food fight has erupted in Congress over the labeling of genetically engineered foods.

At the center of the conflict is a bill sponsored by Rep. Mike Pompeo (R.-Kansas) that would block state and local laws from requiring food labels to disclose foods with GMOs, McClatchyDC.com reports.

Three states – Vermont, Connecticut, and Maine – have passed mandatory GMO labeling laws and 15 other states are considering similar regulations.

But Pompeo’s “Safe and Accurate Food Labeling Act” would nix those laws in favor of a voluntary federally regulated national labeling system.

The American Association for the Advancement of Science, the American Medical Association, and the World Health Organization have deemed all GMOs on the market as safe.

But as consumers grow increasingly concerned about what’s in their food – from antibiotics and hormones to additives and trans fats – pressure is mounting on the food industry and producers to be more transparent.

More than five dozen countries now require GMO labeling