Ogawa-Weight_loss-Summary (IMAGE) Kobe University Caption The different versions of the signal molecule PGC-1⍺ react to different stimuli. The standard version (“a”) is produced in response to long-term exercise, whereas the alternative versions (“b/c”) are produced in response to short-term exercise or cold exposure. A lack of these versions makes it harder for affected individuals to respond to these stimuli by burning fat or building muscle mass. Credit K. Nomura et al. Published by Elsevier GmbH. DOI: 10.1016/j.molmet.2024.101968 Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.