Would a tax on sugary drinks make Mexico healthier?
26 October 2013 Last updated at 00:03 BST
A controversial tax on soft drinks is currently being debated in Mexico's Congress.
But can a tax really reduce the nation's waistlines?
Over a third of Mexican adults are overweight, putting them way up the global league tables for obese nations.
A possible cause is found in another of Mexico's dubious honours - being the world's biggest consumer of soft drinks.
Now the government is proposing a controversial new step: a tax of eight US cents on every litre of sugary drink.
Juan Carlos Perez Salazar reports from Mexico City.