Reportage at the Polytechnic school in Lausanne (Switzerland), in the integrated systems lab. The lab is developing an implantable system allowing human metabolism to be monitored. The implant has 5 biosensors, which measure the density of various molecules, a temperature sensor and a PH sensor. Researchers can select the molecules they wish to detect on each separate biosensor (eg. Glucose or cholesterol). The implant is positioned according to the pathology to be monitored. This device powers the implant and sends data using a special app via Bluetooth to a smartphone, tablet or computer.