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

Researchers at UC San Diego have built a prototype smart ring that analyzes finger sweat to continuously track glucose, ketones, and other biomarkers.

The device pairs with an iPhone app and reportedly matched the accuracy of invasive glucose monitors in testing.

It is still bulky and lasts about 12 hours per charge, but a refined version could offer non-invasive continuous glucose monitoring for diabetes care.