Prototype smart ring cracks the holy grail of non-invasive blood sugar measurement

A prototype smart ring developed by engineers at the University of California appears to have cracked one of the holy grails of health wearables: non-invasive blood sugar measurement. The data is sent to a companion app on a paired iPhone. While existing smart rings rely purely on biophysical data extracted from sensors like those embedded into the Apple Watch, this ring also tracks chemical biomarkers by analysing sweat …