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Smart Watches vs Blood Glucose Measurement: What You Need to Know

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In recent years, the advancement of technology has brought about innovative solutions to monitor health conditions. One such area is blood glucose measurement, particularly for individuals with diabetes. Smart watches and smart rings have emerged claiming to provide non-invasive blood glucose measurement, potentially eliminating the need for painful finger pricks. However, the U.S. Food and Drug Administration (FDA) has issued warnings against relying on these devices for accurate blood glucose readings. In this article, we’ll explore the FDA’s concerns and the importance of using FDA-authorized devices for blood glucose measurement.

The FDA’s Warning

The FDA has raised concerns about the use of smart watches and smart rings to measure blood glucose levels without piercing the skin. These devices, which claim to use non-invasive techniques, have not been authorized, cleared, or approved by the FDA for blood glucose measurement. The FDA emphasizes that these devices are different from smartwatch applications that display data from FDA-authorized blood glucose measuring devices, such as continuous glucose monitoring systems (CGMs) that use needles to read blood sugar levels.

The FDA warns that using unauthorized smart watches or smart rings for blood glucose measurement can lead to inaccurate readings, which can have serious implications for individuals with diabetes. Incorrect blood glucose measurements can result in errors in diabetes management, including taking incorrect doses of medication such as insulin or other glucose-lowering drugs. This can lead to dangerously low blood sugar levels, causing symptoms like mental confusion, coma, or even death within hours of the error.

Risks and Recommendations for Consumers, Patients, and Caregivers

For individuals with diabetes who rely on accurate blood glucose measurements, it is crucial to avoid using smart watches or smart rings that claim to measure blood glucose levels without proper FDA authorization. These devices may be available for purchase through online marketplaces or directly from sellers. However, the safety and effectiveness of these devices have not been evaluated by the FDA, and relying on them can lead to inaccurate blood glucose readings.

If accurate blood glucose measurements are essential for your medical care, it is advisable to consult with your healthcare provider about using an appropriate FDA-authorized device. Your healthcare provider can guide you in selecting a reliable blood glucose measuring device that meets the necessary regulatory standards for accuracy and safety.

The Development of Non-Invasive Blood Glucose Monitoring

Companies like Apple and Samsung have been exploring the development of non-invasive blood glucose monitoring technology for their smart watches. Apple, in particular, has been working on optical absorption spectroscopy using a laser to shine light under the skin to determine blood glucose levels. However, as of now, these technologies are still in the research and development phase. It may take several more years before these devices are ready for market release and receive FDA approval.

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The Importance of FDA Authorization

The FDA plays a crucial role in ensuring the safety and efficacy of medical devices, including those used for blood glucose measurement. Before a device can be marketed and sold in the United States, it must go through a rigorous review process by the FDA to assess its performance, accuracy, and safety. FDA-authorized devices, such as CGMs, have met the necessary standards and regulations to provide reliable blood glucose measurements.

Using FDA-authorized devices for blood glucose measurement provides reassurance that the device has undergone thorough testing and evaluation. It also ensures that the device meets the necessary requirements for accuracy and safety. Relying on unauthorized devices can put individuals at risk of inaccurate measurements, potentially leading to improper diabetes management and health complications.

Reporting Problems and Ensuring Safety

The FDA actively monitors the medical device market to identify unauthorized products being marketed to consumers. The agency is committed to protecting public health by preventing the illegal marketing of unauthorized smart watches and smart rings for blood glucose measurement. If you believe you have encountered an unauthorized device or have experienced problems with inaccurate blood glucose measurements, it is crucial to report the issue to the FDA.

Reporting problems with unauthorized devices can help the FDA gather important data and better understand the risks associated with these devices. It also contributes to improving patient safety and preventing potential harm caused by unreliable blood glucose measurements. Healthcare personnel employed by facilities subject to FDA reporting requirements should follow the reporting procedures established by their facilities to ensure prompt and accurate reporting.


While the idea of non-invasive blood glucose monitoring through smart watches and smart rings holds promise, it is essential to prioritize accuracy and safety. The FDA’s warning against using unauthorized devices for blood glucose measurement serves as a reminder of the importance of relying on FDA-authorized devices. If you have diabetes or require accurate blood glucose measurements for medical purposes, consult with your healthcare provider to ensure you are using a reliable and FDA-approved device. By doing so, you can effectively manage your condition and make informed decisions about your health. Stay vigilant, stay informed, and prioritize your well-being.

Additional Information

  • Additional information about FDA-authorized blood glucose measuring devices can be found on the FDA’s official website.
  • Consumers can report problems with unauthorized devices or inaccurate blood glucose measurements through the FDA’s MedWatch Voluntary Reporting Form.
  • Healthcare providers can find resources and guidance on selecting appropriate blood glucose measuring devices for their patients on the FDA’s website dedicated to medical devices.


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