Wearable Devices Now Track Blood Sugar in Real Time

Health Points

• Continuous glucose monitors provide real-time blood sugar readings throughout the day and night without finger pricks
• These devices were originally designed for people with diabetes but are now being marketed to the general public
• Medical experts caution that healthy adults may not need continuous glucose monitoring and should focus on proven wellness habits instead

A new generation of wearable health devices promises to revolutionize how Americans monitor their blood sugar levels. Continuous glucose monitors, or CGMs, attach to the skin and track glucose levels around the clock, offering insights that were once available only to people managing diabetes.

These small sensors measure glucose levels in the fluid beneath the skin every few minutes. The data transmits wirelessly to a smartphone app, creating a detailed picture of how the body responds to food, exercise, stress, and sleep. Unlike traditional blood sugar testing that requires pricking a finger multiple times daily, CGMs work continuously in the background.

For decades, CGMs have been essential tools for people with Type 1 diabetes and some with Type 2 diabetes who need insulin. The technology helps them avoid dangerous blood sugar spikes and crashes that can lead to serious complications. Recent advances have made the devices smaller, more accurate, and easier to use.

Now companies are marketing CGMs to people without diabetes, claiming the devices can optimize energy levels, improve athletic performance, and guide better food choices. Several brands offer over-the-counter versions that don’t require a prescription. The trend has gained traction among health-conscious consumers looking for data-driven approaches to wellness.

But medical professionals urge caution about the widespread adoption of CGMs by healthy individuals. The devices provide valuable information for people who truly need them, yet most adults can maintain good health through time-tested principles rather than constant monitoring.

“For people without diabetes, the benefits of continuous glucose monitoring are unclear,” says Dr. Robert Gabbay, chief scientific and medical officer at the American Diabetes Association. “A healthy diet, regular physical activity, and maintaining a healthy weight are proven strategies that don’t require expensive technology.”

The human body naturally regulates blood sugar within a normal range. In healthy people, glucose levels fluctuate throughout the day in response to meals and activity—this is completely normal. Seeing these natural variations on a graph might create unnecessary anxiety or lead to overly restrictive eating patterns.

Healthcare providers worry that CGM data could be misinterpreted by people unfamiliar with glucose metabolism. A spike after eating fruit, for example, might prompt someone to eliminate nutritious foods from their diet unnecessarily. Some experts also note that the devices haven’t been studied extensively in people without diabetes, so the long-term impact of acting on CGM data remains unknown.

The cost presents another consideration. CGMs typically cost between $75 and $400 per month without insurance coverage. For people with diabetes, insurance often covers most or all of the expense because the devices are medically necessary. But healthy individuals would pay out of pocket for technology they may not need.

For those genuinely at risk for diabetes—people with prediabetes, a family history of the disease, or other risk factors—traditional screening methods remain the gold standard. An annual checkup with a simple fasting glucose test or hemoglobin A1C measurement provides reliable information about diabetes risk without daily monitoring.

The appeal of CGMs reflects a broader cultural shift toward personalized health data and preventive care. Americans increasingly want to understand what’s happening inside their bodies and take proactive steps to maintain wellness. This mindset has positive aspects when it motivates healthy behaviors.

Yet the proliferation of health tracking devices also raises questions about whether constant self-monitoring improves wellbeing or simply creates new sources of stress. Previous generations maintained good health without knowing their step count, sleep stages, or minute-by-minute glucose levels.

“Technology can be a useful tool, but it’s not a substitute for healthy lifestyle habits,” notes Dr. Anne Peters, professor of medicine at the University of Southern California. “The fundamentals of good health haven’t changed—eating well, staying active, managing stress, and getting adequate sleep.”

For people with diabetes, CGMs represent genuine medical progress. The devices reduce the burden of disease management and help prevent complications. Access to this technology should continue expanding for those who medically benefit from it.

Healthy individuals curious about their metabolism have other options beyond CGMs. Working with a registered dietitian can provide personalized nutrition guidance. Paying attention to how different foods affect energy and mood offers practical insights without technology. Regular medical checkups catch potential problems early.

The decision to use a CGM ultimately depends on individual circumstances, health goals, and budget. People considering these devices should discuss the choice with their healthcare provider to determine whether continuous glucose monitoring makes sense for their situation. For most healthy adults, the answer is probably no.

As wearable health technology continues advancing, consumers benefit from maintaining perspective about what devices can and cannot do. CGMs provide data, but wisdom about using that information comes from medical training and clinical experience. The most valuable health insights often come not from gadgets but from time-tested principles of balanced living.