How accurate is the Dexcom G6 compared to FreeStyle Libre?
Both continuous glucose monitors provide reliable readings, but there are some differences to keep in mind.
Sensor-based devices like both Dexcom G6 and FreeStyle Libre can be slightly less accurate when your blood sugar is very high or very low compared to Show Full Answer
How accurate is the Dexcom G6 compared to FreeStyle Libre?
Both continuous glucose monitors provide reliable readings, but there are some differences to keep in mind.
Sensor-based devices like both Dexcom G6 and FreeStyle Libre can be slightly less accurate when your blood sugar is very high or very low compared to traditional finger-stick testing. Studies have shown that CGM sensors may not be as precise at extreme glucose levels.
If either device gives you an unusual or unexpected reading, it's a good idea to confirm it with a traditional finger stick to be safe.
Tips for getting started with Dexcom G6:
* Check the manufacturer's website for detailed instructions and setup videos
* Give yourself time to adjust to wearing the sensor and interpreting the data
* Don't hesitate to contact Dexcom support or ask your healthcare provider if you have questions about readings
* Remember that CGMs show trends, which can be just as helpful as individual numbers
Many people find that switching between CGM brands takes a little adjustment, but the technology behind both is quite similar. You'll likely adapt quickly to the Dexcom interface.
November 16, 2025
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