A Continuous Glucose Monitor (CGM) is a wearable device that measures glucose levels throughout the day and night without requiring frequent fingerstick testing for routine monitoring. By providing real-time glucose readings and trends, CGMs help many people better understand how food, physical activity, medications, and daily routines affect blood sugar levels. CGMs are commonly used by people with diabetes, although some devices are also available for broader wellness or over-the-counter use, depending on local regulations and the specific product.
A CGM system typically consists of:
The sensor measures glucose in the fluid between cells and sends readings automatically at regular intervals.
Once applied, the sensor continuously measures glucose levels.
Many systems provide:
Most sensors are replaced every several days or weeks, depending on the model.
CGMs may help users:
Individual benefits vary depending on the device and medical condition.
A healthcare provider may recommend a CGM for people who:
Eligibility depends on medical needs and healthcare recommendations.
When choosing a CGM, common features include:
Available features differ among manufacturers.
Many CGMs allow users to:
The device should be used according to the manufacturer's instructions.
CGM data can help healthcare professionals:
Treatment decisions should always be based on professional medical advice.
While CGMs offer many advantages:
Understanding these factors can help users get the most from the device.
Continuous glucose monitors have transformed the way many people monitor blood sugar by providing real-time glucose readings, trend information, and customizable alerts. For individuals with diabetes, a CGM can support more informed treatment decisions and improve day-to-day glucose management when used alongside medical guidance. Choosing the right system depends on individual health needs, device features, and recommendations from a qualified healthcare professional.