The Lipid Hunter (IMAGE) University of Utah Health Caption Liquid chromatography -- mass spectrometry (LC-MS) was instrumental in identifying a new lipid fuel source for brown fat, a 'good fat' that generates body heat in response to the cold. Credit Charlie Ehlert, University of Utah Health Usage Restrictions With credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.