https://www.sciencedaily.com/releases/2018/06/180627160520.htm

Led by Jane Kolodinsky, an applied economist in UVM's College of Agriculture and Life Sciences, the study compared levels of consumer opposition to GMO foods in Vermont -- the only U.S. state to have implemented a mandatory labeling policy -- with consumer attitudes in the rest of the U.S. The analysis showed opposition to GMO food fell by 19% in Vermont after the implementation of mandatory labels.

The study is the first to examine the real-world impact of consumer attitudes toward GMO foods in a state where consumers were exposed to mandatory GMO labels.