# Handheld device measures body fat burning Scientists develop a device that detects fat burning by measuring acetone in breath. - **Source:** [Engadget](https://www.engadget.com) - **Published:** 2026-07-23 - **Original article:** - **On Brifing:** https://brifing.si/s/5e85f1c7-a01a-4b7c-8df8-523e62d4c9d1 ## A new way to measure fat burning Scientists have developed a handheld device that determines whether the body is burning fat by measuring acetone levels in breath. This method yields results close to traditional lab tests. ## Ketosis and acetone connection Ketosis refers to the state where the body converts fat into energy. Acetone appears as a byproduct in breath during this process. The new device uses this information to detect fat burning. ## Overcoming lab limitations Acetone measurements are usually most accurate in a lab. However, this device overcomes these limitations by controlling humidity and breathing patterns. ## User-friendly app The device comes with an app that guides users through the breathing process. This ensures measurements are as accurate as blood tests. ## Potential in health applications This device can be used in various health settings, from measuring the effectiveness of GLP-1 therapies to helping athletes fine-tune their metabolism. ## Future implications This technology could simplify personal health tracking, helping people better understand their metabolic processes. It could also play a significant role in managing diseases like obesity and diabetes. ## Sources covering this story - https://www.engadget.com/2222231/scientists-develop-handheld-device-for-measuring-when-your-body-is-burning-fat/ — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._