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. It transmits real time data via Bluetooth. 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. A researcher is developing a larger version of the biosensors, she places a nanotube carbon solution and a specific enzyme on the nano-materials, which allow the desired molecule to be measured.