ScreenshotA 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. These enable the collection of an impressive range of data, including resting heart rate, heart rate variability, respiratory rate, temperature, cardiovascular age, activity, sleep cycles, and more. But supplementing existing sensors with molecular ones could dramatically increase the amount of health data that can be gathered. Engineers at the University of California, San Diego, believe they have created the first smart ring that uses finger sweat to track chemical biomarkers. The ring is only a prototype, but it shows the potential for future smart rings to continuously monitor the body on a molecular level instead of relying solely on biophysical data.