Gut Microbes (image) California Institute of Technology Share Print E-Mail Caption Gut microbes play an important role in modulating metabolites that impact health and disease. Credit E. Hsiao/Caltech Usage Restrictions With attribution. Share Print E-Mail 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.