A New Smart Ring Uses Finger Sweat to Track Health

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

The ring uses an osmotic hydrogel to draw sweat and electrochemical sensors to measure the compounds, then sends results to a smartphone app.

Early tests found its glucose and ketone readings closely matched commercial monitors.

If validated, the device could support continuous, noninvasive monitoring for diabetes management and nutrition tracking.