Innovative Smart Ring Measures Blood Sugar via Finger Sweat

WHO:

9to5Mac - Engineers at the University of California, San Diego developed the prototype smart ring.

9to5Mac - Joseph Wang is a professor in the Aiiso Yufeng Li Family Department of Chemical and Nano Engineering.

WHAT:

9to5Mac - The prototype smart ring has a battery life of just 12 hours.

9to5Mac - The prototype is described as "rather chunky."

9to5Mac - The prototype smart ring measures blood sugar non-invasively by analyzing finger sweat.

9to5Mac - The ring can monitor up to four biochemical measurements: glucose, ketones, vitamin C, uric acid, lactate, and alcohol concentrations.

9to5Mac - The prototype achieved accuracy similar to invasive continuous glucose monitors and blood draws.

CNET - The smart ring is designed to track biochemical health measurements like glucose, vitamin C, and alcohol levels.

WHERE:

9to5Mac - The development took place at the University of California, San Diego.

WHEN:

9to5Mac - A paper detailing the smart ring was published in Nature Communications on July 23.

WHY:

9to5Mac - Joseph Wang stated, “The ring’s ability to track both glucose and ketone continuously and simultaneously would greatly benefit optimal insulin dosing for the management of diabetes.”

9to5Mac - The ring could benefit individuals with Type 1 diabetes by aiding in optimal insulin dosing for diabetes management.

HOW:

9to5Mac - The smart ring uses molecular sensors to analyze sweat, allowing for continuous monitoring of health data without the need for physical exertion.

9to5Mac - The technology is able to pull sweat from the skin without requiring the user to work up a sweat.

(UPDATED July 29, 2026 18:25 UTC)

A new prototype smart ring has been unveiled, featuring a battery life of just twelve hours and described as "rather chunky." According to Joseph Wang, this innovative device has the potential to continuously and simultaneously track both glucose and ketone levels, which could greatly enhance insulin dosing for diabetes management. The development highlights the ongoing advancements in wearable technology aimed at improving health monitoring.

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(UPDATED July 29, 2026 16:27 UTC)

Engineers at the University of California, San Diego have developed a prototype smart ring that measures blood sugar non-invasively by analyzing finger sweat, achieving accuracy comparable to traditional glucose monitors. This innovative device can track up to four biochemical measurements, including glucose, vitamin C, and alcohol levels, making it particularly beneficial for individuals with Type 1 diabetes in managing their insulin dosing. Utilizing advanced molecular sensors, the smart ring continuously monitors health data without requiring users to exert themselves to produce sweat.