According to Oliver Fiehn, a metabolomics researcher at the University of California, Davis, people are much more than meets the eye. “We are not just human,” he said. “We are an ecosystem.” The ...

Cologuard is a colon cancer screening test you can do at home. It’s a noninvasive, stool-based test that comes in a kit. You use the kit to collect a stool sample. Then you send the sample to a lab ...

Pancreatic elastase is the digestive enzyme the pancreas produces to help digest food. Doctors can measure elastase levels by testing a stool sample. Low levels could indicate exocrine pancreatic ...