The US Food and Drug Administration has approved Dexcom’s Stelo Glucose Biosensor System, the first over-the-counter continuous glucose monitor for children, the agency said in a statement on June 12. Stelo can now be marketed for use by people aged 2 years and older who do not use insulin. This includes diabetics who take oral medication for their condition. Adult supervision is required if a child uses the Stelo.

The FDA had already approved the system for people aged 18 years and older in 2024.

Over-the-counter continuous glucose monitors have gained popularity over recent years. These devices are designed to help people manage diabetes and other conditions that require monitoring of their glucose (blood sugar) levels. However, people without medical conditions who are curious about how their diet, exercise and other lifestyle factors affect their glucose levels have also started using CGMs.

Why children? Why now?

“Children deserve access to the best tools available to manage their health,” Dr. Michelle Tarver, director of the FDA’s Center for Devices and Radiological Health, said in the press release. “Today’s clearance reflects the FDA’s commitment to fostering innovation for pediatric patients and supporting the safe and effective use of medical devices where children live, learn and play.”

According to the FDA, prediabetes is becoming more common among US children, putting millions of them at risk for Type 2 diabetes. The hope is that over-the-counter continuous glucose monitors can help address this concern by increasing children’s and caregivers’ awareness of the connections between blood sugar, diet and exercise, leading to healthier outcomes. 

How Stelo works

Paired with an app on a smart device, the Stelo Glucose Biosensor System uses a wearable sensor to measure glucose levels and then displays them on the app every 15 minutes. Each sensor lasts up to 15 days before needing to be replaced, but its wear time may be shorter in children than in adults, “due to several interconnected physiological and behavioral factors,” the FDA release said.

Before making medication adjustments based on Stelo’s readings, children and their caregivers should consult their doctor. 

The FDA and Dexcom’s research

According to the FDA, to understand how Stelo performs when used by children during the 15-day wear period, both the administration and Dexcom used previous clinical study data from children and adults, along with real-world evidence from collected data on current iCGM use among both groups. iCGM is an FDA product classification that stands for integrated continuous glucose monitoring systems.

“Participants in the previous study reported mild adverse events, including local infection, skin irritation and pain or discomfort,” the FDA warned.

Who shouldn’t use Stelo?

Dexcom’s Stelo is not for people who use insulin, are on dialysis or have low blood sugar, because it cannot alert people when glucose drops to unsafe levels. People with eating disorders or a history of disordered eating should consult a doctor before using Stelo.

Why you should consult your doctor first

Before you buy an over-the-counter continuous glucose monitor for yourself or your child, consult your doctor. While these devices can be helpful for some, they aren’t right for everyone. 

Dr. David Ahn, chief of diabetes services at Hoag, a health care system in California, told the American Diabetes Association in May 2025 that there isn’t enough data for doctors to distinguish healthy from unhealthy glucose spikes in people with prediabetes or no diabetes.

“In our enthusiasm to expand [the continuous glucose monitor] and who uses it, it is important that we are not blind to its shortcomings,” Ahn said.