SCIENCE: FDA Approves Ingestible Sensor That Tracks Health From The Inside. “The US Food and Drug Administration has approved an ingestible digital sensor that can be swallowed in a pill to track health data from inside the body. The idea is that the data can be used not only by patients themselves, but also by caregivers and doctors to individualize their care. The ingestible sensor, formerly known as the Ingestion Event Marker or IEM, is already approved for use in Europe.”