Science image (IMAGE) Salk Institute Caption The inner folds of the intestines (purple) are different in healthy mice (left) compared to mice fed a high-fat diet (right). Salk researchers identified changes in bacteria and bile acids that drive these changes. Credit Salk Institute Usage Restrictions with credit and related coverage. License Original 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.