2012 California Proposition 37

Proposition 37 was a California ballot measure rejected in California at the statewide election on November 6, 2012. This initiative statute would have required labeling of genetically engineered food, with some exceptions. It would have disallowed the practice of labeling genetically engineered food with the word "natural." This proposition was one of the main concerns by the organizers of the March Against Monsanto in May 2013.