Expert caution grows over using continuous glucose monitors in healthy adults

As continuous glucose monitors creep into the wellness market, experts warn that for people without diabetes, these devices may offer limited clinical benefit and could cause unnecessary anxiety, highlighting the need for cautious use and further research.

For people without diabetes, the recent fashion for checking glucose levels with continuous glucose monitors is drawing growing scepticism from specialists, even as the devices move from hospitals into the wellness market. Media Indonesia reported that these small skin sensors, once largely reserved for people managing diabetes, are now being promoted to healthy users as tools for tracking diet, exercise, sleep and overall metabolic health. The question, several experts say, is not whether the data are interesting, but whether they are actually useful.

According to Harvard Health and Johns Hopkins Bloomberg School of Public Health, there is still no strong evidence that continuous glucose monitors provide clear clinical benefit for adults who do not have diabetes. Both institutions note that the devices can be helpful for people with diabetes because they support day-to-day management, but the case is much weaker for the general population. Harvard Health says future research may clarify whether the technology has a role for people with risk factors such as excess weight or a family history of diabetes, but that evidence has not yet arrived.

That caution matters because a glucose rise after eating is usually a normal part of healthy physiology. Media Indonesia, drawing on endocrinology expertise, reported that the body of a person without diabetes typically produces enough insulin to process the sugar from food and return levels to a safe range. In that context, brief post-meal spikes are not automatically a warning sign. Healthline likewise noted that some healthy users are attracted by the chance to see how food, exercise, stress and sleep affect readings, but warned that normal fluctuations can be misread as a problem.

Specialists also point to a second limitation: these monitors do not measure blood glucose directly. As Johns Hopkins and other medical commentators explain, they read glucose in interstitial fluid, the fluid surrounding cells just under the skin, which means there can be a lag and the device is better at showing trends than giving a precise snapshot at every moment. Media Indonesia also reported that this can be especially important when readings are in the normal or low range, where accuracy may be less reliable than with a laboratory test or finger-prick meter.

The wider concern is that data intended to encourage healthier habits can sometimes have the opposite effect. Healthline and Harvard Health both warned that healthy people may become anxious over ordinary glucose movement and unnecessarily cut out foods that are not medically harmful. The emerging consensus across the sources is that, for most adults without diabetes, sensible eating, regular exercise and routine health checks remain the most effective ways to support metabolic health, while continuous monitoring is still better seen as an optional learning tool than a proven necessity.