Scientists create tattoo-like sensors that reveal blood oxygen levels

People get tattoos to remember an event or a person, to make a statement, or simply as an aesthetic embellishment. But imagine a tattoo that could be functional—telling you how much oxygen you are using when exercising, measuring your blood glucose level at any time of day, or monitoring a number of different blood components or exposure to environmental toxins.

source https://medicalxpress.com/news/2022-05-scientists-tattoo-like-sensors-reveal-blood.html