A noninvasive or minimally invasive blood glucose monitor is a kind of a holy grail. Right now, there aren’t any FDA-approved noninvasive glucose trackers on the market. Not only would it be a huge upgrade in lifestyle for those with diabetes, but it could solve some of the problems with patients not following their treatment plans. Up to now every attempt to develop a non-invasive technique to measure blood sugars has failed at a cost of billions of dollars. All of those attempts have run into problems. To start, there’s not very much glucose floating around in your blood, so if you’re using something like sweat to measure glucose levels, there’s just not that much to go on. Blood sugar spills over into tears, spit, sweat, or urine if levels are too high, but as levels drop it becomes virtually undetectable without breaking the skin. Even finger prick tests can wind up with inaccurate results. And if someone has diabetes, inaccurate results could be dangerous, driving people to take insulin if they don’t need it or skip it when they do. But, this device might be the answer. The developer, Yihao Chen in China, said this device might be different. Calibrated properly, he said, the system could be suitable for medical-grade continuous glucose monitoring. Still, the study for this device was small and the research is in early stages. Much more work is needed to determine how accurate and easy-to-use this patch really is.