ETH Zurich Develops 1-Breath Fat-Burning Detector, Matching Lab and Blood Tests in 12 Volunteers
Updated
Updated · New Scientist · Jul 22
ETH Zurich Develops 1-Breath Fat-Burning Detector, Matching Lab and Blood Tests in 12 Volunteers
3 articles · Updated · New Scientist · Jul 22
Summary
Nutrion, a handheld breathalyser from ETH Zurich and Andreas Güntner, detected fat burning from a single exhalation and closely tracked both lab breath-acetone readings and blood-ketone levels in 12 healthy volunteers.
The device targets acetone—a ketone byproduct of fat metabolism—and pairs an acetone-specific sensor with miniature filters plus a smartphone app that captures the end of the third breath, where readings best mirror blood levels.
Researchers said that setup reduced interference from humidity, alcohol and breathing variation, allowing the device to pick up short-term metabolic shifts after exercise and after sugary drinks or carbohydrate-rich meals.
Beyond weight loss and intermittent fasting, Nutrion is being tested as a less invasive alternative to finger-prick ketone monitoring in epilepsy, with additional studies under way alongside GLP-1 therapy and ketogenic cancer treatment.
As tech giants launch skin-worn sensors, can a handheld breathalyser truly compete in the lucrative metabolic tracking market?
This fat-burning breathalyser is now for sale, so why can't US doctors use it to treat epilepsy or cancer patients?
Nutrion Breath Analyzer: Revolutionizing Fat-Burning and Metabolic Health Tracking in 2026
Overview
The Nutrion breath acetone analyser, developed through pioneering work at ETH Zurich and Alivion AG, marks a major step forward in personal health monitoring. This user-friendly device lets individuals track their fat metabolism in real time by measuring breath acetone, a key biomarker for fat burning, with a simple breath test. As of July 2026, Nutrion is gaining attention for making it easy to detect when the body switches to burning fat, offering accessible and immediate insights into metabolic health. Its innovative approach is set to transform how people manage and understand their wellness.