# Breathalyzer detects fat burning from a single exhale

Researchers developed a breathalyzer that measures acetone in breath to determine if the body is burning fat. The device provides a non-invasive, real-time way to monitor metabolic state. This innovation could aid personalized diet and fitness tracking.

**Importance:** 3/5

## Sources

### Science
- [Nature](https://www.nature.com/articles/d41586-026-02295-w) — 2026-07-23