META has been working on its glucoWISE Home Hub system, which comprises of two parts: the Diabet non-invasive glucose sensor and its accompanying wearable sensor. The system utilizes radio waves, machine learning, and metamaterial film to take blood sugar level readings without the need for a painful blood draw.
https://www.notebookcheck.net/Diabet-non-invasive-glucose-monitor-targets-blood-draw-elimination-with-the-META-glucoWISE-Home-Hub-system.589202.0.html