For many people, measuring blood glucose currently involves pricking a finger with a needle attached to a device. The blood sample is then analyzed by a continuous glucose monitor (CGM), which often needs to be calibrated at least twice a day. The process can be difficult, uncomfortable, and inconvenient, especially for children and people who need to test their blood in the middle of the night. As a result, some people are unable to measure their levels as often or as accurately as necessary. The researchers behind the current study hope that a noninvasive method will help improve compliance rates, particularly among those who need to monitor their glucose levels closely, such as people with diabetes.