Sometimes your CGM may be calibrated slightly higher or slightly lower than the true value.
How to Calibrate
To adjust for this, we offer a manual calibration feature within the app:
1. Go into your app
2. Go into the sidebar menu in the upper lefthand corner
3. Select "Settings"
4. Select "Sensor"
5. Calibrate your sensor up or down by clicking into the calibration box, then sliding the scale to the correct amount
Not sure how much to calibrate?
You can adjust the CGM graph in comparison to a recent fasting glucose value from a lab or a fasting glucose value taken from a glucometer at home. Let's say you take a fasting glucometer value and it says 90, but the CGM fasting value says 110. You can make the baseline adjustment "-20" and refresh the app and the whole graph will be shifted 20 points down.
Tips for Calibration
Only calibrate when your glucose is stable.
This means you should wait to calibrate your sensor after the first 24 hours of wearing it. Make sure you are only calibrating based on fasting values of your CGM and a recent fasting glucose value from a lab or a fasting glucose value taken from a glucometer at home. If you try to calibrate when your levels are not stable your values might be a little off.
Pay attention to trends, not specific numbers
By following overall trends rather than exact numbers you can get a better idea of how your glucose fluctuates throughout the day and in relation to different foods and activities.
CGMs are great for getting a zoomed-out view of your glucose response.
One then done
We suggest only calibrating one time per sensor. Constant calibration can lead to data distortion. The purpose of calibration is to increase the accuracy of your values. Constant calibration can be counterproductive to that goal. Continuously calibrating a sensor to match a glucometer measurement is like trying to hit a moving target. It will never be perfect, even when taking readings in a fasting state, so the best thing to do is to get close and spend time reviewing your trends over time.
Please note: Not all sensors will need calibration, it is a feature we offer to enable increasing the accuracy of your CGM to your true values. When you calibrate your sensor, it will change your values for the entire life of the sensor.
Do you still have questions on why you need to calibrate your CGM?