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www.fdanews.com/articles/157323-flab-app-a-pocket-sized-device-measures-how-much-fat-is-burned-while-exercising

‘Flab App’: A Pocket-Sized Device Measures How Much Fat Is Burned While Exercising

July 25, 2013
Japanese scientists have created an app that can analyze the acetone content in human breath in order to determine how much fat is burned during exercise. The app’s creators, of NTT DOCOMO Research Laboratories, hopes that the new app will help people with weight and diet control in an era when obesity has become a major threat to productivity and well-being.
Medical Daily