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

UC San Diego researchers unveiled a prototype smart ring that reads finger sweat to track biomarkers such as glucose, ketones, vitamin C, uric acid, lactate, and alcohol.

In testing, it showed accuracy similar to invasive glucose monitors and sends readings to a paired iPhone app.

Published in Nature Communications, the device could eventually make continuous blood sugar and ketone monitoring easier for people with diabetes.

The current prototype is still bulky and lasts about 12 hours per charge.