FILE - In this July 10, 2013, file photo, office workers eats tacos at an outdoor food stand during lunch time in Mexico City. Mexico has surpassed the United States in levels of adult obesity. Mexico's new food labeling rules were supposed to help fight an obesity epidemic, but activists and experts said Monday, april 21, 2014, that they may actually encourage the public to consume high levels of sugar. (AP Photo/Ivan Pierre Aguirre,File)