Calibration is not required with the Dexcom G7 Continuous Glucose Monitoring system. However, you can always log your fasting values to ensure optimal accuracy.
The Dexcom app has a built-in calibration feature, calibrating is easy and can be done following the steps below:
1. Tap the + while in the Glucose or History Tab
2. For entry type select "Use as Calibration"
3. Enter your blood glucose reading
4. Enter the date and time of the reading
5. Hit save.
For more details, please refer to the following guide on the Dexcom website: How to Calibrate your Dexcom G7 sensor?
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