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Kenneth Cusi

FILE - In this June 26, 2012, file photo, two women converse in New York. "Socially accepted normal body weight is shifting toward heavier weight. As more people around us are getting heavier, we simply believe we are fine, and no need to do anything with it," said Dr. Jian Zhang, a public health researcher at Georgia Southern University and the lead author in a study released on Tuesday, March 7, 2017. (AP Photo/Mark Lennihan, File) (AP)

Our fight with fat: Why is obesity getting worse?

Kenneth Cusi