he hormone cortisol rises and falls naturally throughout the day and can spike in response to stress but current methods for measuring cortisol levels require waiting several days for results from a lab. By the time a person learns the results of a cortisol test – which may inform treatment for certain medical conditions – it is likely different from the current level of cortisol.
Now, a group led by materials scientist Alberto Salleo at Stanford University has created a stretchy patch that, applied directly to the skin, wicks up sweat and assesses how much cortisol a person is producing. A paper about the wearable sensor was published July 20 in Science Advances.
Co-author Scott Keene is a 2015 Stanford Graduate Fellow.