Engineers at the University of California San Diego created a smart ring that simultaneously and continuously monitors up to four different chemical biomarkers from finger sweat.
The biomarkers the smart ring can monitor in sweat are glucose, ketones, vitamin C, uric acid, lactate and alcohol.
For the ring to detect biomarkers in sweat, exercise or other exertion is not required; sweat is passively drawn up through the skin's surface via osmosis using a technique pioneered by Saha.
Tracking multiple biomarkers simultaneously has the potential to broaden the real-time health picture in many scenarios, including diabetes management and nutrition tracking.
In trials with healthy volunteers and people with type 1 diabetes, the biomarker smart ring's glucose readings closely tracked those from commercial continuous glucose monitors (CGMs), while the ketone readings closely tracked those from commercial blood meters.
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