Continuous glucose monitor (CGM)

A continuous glucose monitor (CGM) is a wearable sensor, typically inserted into subcutaneous tissue, that measures interstitial glucose every few minutes, typically about 7 to 14 days for transcutaneous sensors (system-dependent), and up to a year for implantable devices such as Eversense 365. It generates trend data on fasting, postprandial, and nocturnal glucose, time-in-range, and glycemic variability. CGMs are increasingly used in non-diabetic adults to personalize nutrition and inform longevity-oriented lifestyle adjustments.