Pocket-sized sensor for fat burning updates

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A new device has been developed in Japan that can instantly tell if your body is burning fat.
The portable pocket-sized sensor works by measuring increased levels of acetone on the breath, a good indicator of when the body has begun to break down fat. This device, which can det-ect acetone concentrations, is 10 cm long and weighs 125 grams.
Once a user blows into the device, acetone concentration le-vels can be calculated and sent within 10 seconds.