It's not abnormal for people’s blood sugar levels to dip below 70 mg/dl (3.9 mmol/L) every now and then. In one study of healthy individuals wearing CGM, 41% of people experienced glucose levels less than 70 mg/dL in a 24-hour period.
Instead of focusing on any single reading, what matters most are the overall trends in your blood sugar readings over the course of the day.
A few other reasons you might be seeing low readings include:
Nighttime dips: If you dip into the red overnight, don’t panic! It’s normal for blood sugar levels to dip while sleeping because your body needs less glucose to perform essential functions. As long as your levels stabilize during the daytime, there’s no reason to worry about hypoglycemia. Low nighttime readings can also happen as a result of laying on the sensor.
Your personal glucose range is different from the range we’ve set: The blood sugar range in your app/reader is set to a standardized range and is not personalized to you. This means you may see readings outside of the green/blue bar that are normal and expected.
Post-meal dips (a.k.a. a blood sugar crash): Dips that occur just after a post-meal blood sugar spike may indicate reactive hypoglycemia. This can sound a bit scary but isn’t a concern for people without diabetes if it only happens once in a while.
Sensor calibration period: If you're seeing very low glucose levels within the first 2 days of applying your sensor, it may still be calibrating.
Sensor errors: If you no longer see rises in your blood sugar graph after eating carbohydrate-rich meals, please get in touch with our coaching team through your in-app chat so we can confirm your sensor is working as expected.
💬 If your levels stay in the red for many hours and aren’t feeling unwell, please reach out to our coaching team through your in-app chat. If you feel unwell at any point, please reach out to your doctor.