The Chowhound Team split this tangent from the Los Angeles board
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Some Mexican bottlers have switched to HFCS, but not all. This is due to a trade ruling (apparently, American protectionism of its corn industry is OK, but Mexican protection of its sugar industry isn't). I don't know how to figure out whether a particular Mexican-bottled beverage really has sugar or HFCS, but I would trust the purchaser at Galco's to ensure that he's getting what he advertises.