FILE - This Thursday, May 31, 2012 file photo shows a display of various size soft drink cups next to stacks of sugar cubes at a news conference at New York's City Hall. New research greatly strengthens the case against soda and other sugary drinks as culprits in the obesity epidemic. Two major experiments found that children and teens gained less weight when they regularly drank calorie-free beverages instead of sugary ones. A third study gives the first clear evidence that consuming sugary drinks interacts with genes that affect weight. Scientists say the results add weight to the push for taxes, size limits and other policies to curb consumption. (AP Photo/Richard Drew, File)

Associated Press
FILE - This Thursday, May 31, 2012 file photo shows a display of various size soft drink cups next to stacks of sugar cubes at a news conference at New York's City Hall. New research greatly strengthens the case against soda and other sugary drinks as culprits in the obesity epidemic. Two major experiments found that children and teens gained less weight when they regularly drank calorie-free beverages instead of sugary ones. A third study gives the first clear evidence that consuming sugary drinks interacts with genes that affect weight. Scientists say the results add weight to the push for taxes, size limits and other policies to curb consumption. (AP Photo/Richard Drew, File)
FILE - This Thursday, May 31, 2012 file photo shows a display of various size soft drink cups next to stacks of sugar cubes at a news conference at New York's City Hall. New research greatly strengthens the case against soda and other sugary drinks as culprits in the obesity epidemic. Two major experiments found that children and teens gained less weight when they regularly drank calorie-free beverages instead of sugary ones. A third study gives the first clear evidence that consuming sugary drinks interacts with genes that affect weight. Scientists say the results add weight to the push for taxes, size limits and other policies to curb consumption. (AP Photo/Richard Drew, File)
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