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Wearable Skin Monitor Detects Cortisol Levels

The biomarker can track a number of bodily functions.

Stanford University researchers have developed a device that can measure a person’s cortisol levels, according to a study in Science Advances. Cortisol is a biomarker that measures everything from emotional stress to immune function. The device functions by blocking the movement of charged ions through a membrane when cortisol is present. The researchers aren’t done tinkering, though, and say that “future efforts will be aimed at miniaturizing the device, combining different sensing interfaces for multiplexing, data evaluation, processing and transmission of the results to a user interface, noninvasive sweat induction, and harvesting energy directly from bodily fluids to power the device.”

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