Glucose Monitors: Big Money, Little Evidence

People with Type 2 diabetes are being pushed to get costly devices, despite questionable benefit

Trevis Hall, of Fort Washington, Maryland, credits a continuous glucose monitor with helping him get his diabetes under control. Makers of the device say that the instant feedback provides a way to motivate healthier eating and exercise. But experts point out that the few studies on the monitors show conflicting results. Lynne Shallcross/KHN

In the nation’s battle against the diabetes epidemic, the go-to weapon being aggressively promoted to patients is as small as a quarter and worn on the belly or arm.

A continuous glucose monitor holds a tiny sensor that’s inserted just under the skin, alleviating the need for patients to prick their fingers every day to check blood sugar. The monitor constantly tracks glucose levels, sends readings to a patient’s cellphone and doctor, and alerts patients when readings are headed too high or too low.