CGMs are wearable devices that continuously monitor blood sugar levels in real time. They've been invaluable for diabetics—but their potential goes much further. For instance, those with ...

A continuous glucose monitor, or CGM, is a system that helps some people control their diabetes. It automatically checks your blood sugar around the clock -- even while you sleep! Here's how.

Nor will it, he says, until diabetics can wear a cell phone–sized device that continuously monitors their blood sugar and doses them with appropriate amounts of insulin in response. Such a ...