Metabolism (IMAGE) Hiroshima University Caption With the brain still operating in evolutionary survival mode, this latest study, revealing NPGL as a brain chemical that regulates hunger and fat storage in mammals, has broad clinical and societal implications for the study and treatment of obesity and its associated diseases. Credit Kazuyoshi Ukena Usage Restrictions None 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.