Breath, not blood: device measures fat burning in exhaled air

Researchers from ETH Zurich have developed a portable measuring device that detects the metabolic marker acetone in breath almost as accurately as a mass spectrometer

27-Jul-2026 - Acetone is the by-product of fat metabolism that is exhaled via the lungs. It is made when the body burns fat instead of carbohydrates such as sugar. Researchers from ETH Zurich have developed a breath test device that can detect acetone in exhaled air with high precision. The device is very ...