An international team of scientists has found that one simple eye exercise may help you lose weight. According to their study, people who use their eyes in this way weigh about nine pounds less on average than those who don’t.

The eye exercise is pretty simple: It’s called reading food labels.

Research by group of scientists from the University of Santiago de Compostela, the University of Tennessee, the University of Arkansas and the Norwegian Institute for Agricultural Finance Research shows that consumers who read labels are significantly thinner than those who never consider such information when food shopping.

“We know that this information (on food labels) can be used as a mechanism to prevent obesity. We have seen that those who read food labels are those who live in urban areas, those with high school and (college) education. As we would hope therefore, campaigns and public policy can be designed to promote the use of nutritional labeling on menus at restaurants and other public establishments for the benefit of those who usually eat out,” concludes María Loureiro, lead author of the study published in the Agricultural Economics journal.