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Weight loss, one breath at a time: USDA lab tests ‘breathalyzer’ for calories to help dieters

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GRAND FORKS — Leah Whigham imagines a future in which dieters could use a hand-held device to tell them right after a meal how many calories they just consumed, and all they’d have to do would be to breathe in the machine.

She led a project this past year to develop such a device at the U.S. Department of Agriculture Human Nutrition Research Center in Grand Forks.

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