In this Tuesday, Aug. 16, 2016 file photo, two overweight women tour the World Trade Center in New York. (AP/Mark Lennihan)
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Can a genetic test identify newborns at risk of becoming severely obese by middle age?The test examines more than 2 million spots in a person's genetic code, seeking variants that individually nudge a person's obesity risk up by a tiny amount. A high score didn't guarantee obesity, nor a low score rule it out. Those two groups were separated by an average weight difference of about 13 kilograms, researchers said.Results show genetic inheritance "plays a large role in how heavy one gets," Kathiresan said. The risk score probably takes about half of a person's genetic propensity into account, he said, and it shows similar accuracy in predicting ordinary obesity, defined as a BMI of 30 or more.
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