PillTrek, a tiny wireless smart capsule created by Caltech, provides real-time gut health data by detecting electrolytes, ...

More companies are selling nutrition and health-testing services, and a WSJ reporter tried one. Things got weird.

Researchers from the California Institute of Technology (Caltech) have developed a wireless smart capsule packed with sensors ...

Tourists visiting an unfamiliar city would have a hard time finding their way around if they were using nothing but a ...

Your trickiest digestive-health questions, answered by experts. The simplest sign of a smoothly running gastrointestinal tract is also the most boring one: Your gut should chug along quietly and ...

Medically reviewed by Qin Rao, MD Gastrointestinal (GI) bleeding is a symptom of a disease, condition, or injury affecting any part of the gastrointestinal tract. The GI tract includes the esophagus, ...