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Finding Out What You May Expect from Your Glucose Levels

Feb 22

When it comes to keeping tabs on your blood sugar levels throughout the day, nothing beats a Continuous Glucose Monitor (CGM). When utilizing your CGM sensor, here are a few things to keep in mind:

Non-Diabetics' Optimal Blood Glucose Levels

Non-diabetic patients, according to, should strive for a hemoglobin concentration of 75-125 mg/dL. The optimal fasting sugar level is 70 mg/dL to 80 mg/dL, and post-meal glucose levels should not rise above 125 mg/dl.

This is not a hard and fast rule. Some people cannot tolerate these lower levels and will need to get their levels down into this range over a prolonged period. On the other side, certain persons have become "fat acclimated," meaning they can function at lower blood glucose levels.

Consult your primary care physician (PCP) if you'd like to discuss a more specific target range for your blood glucose. A margin of error of approximately 10-20 percent exists for all continuous glucose monitors (CGM).

There are several restrictions when it comes to the accuracy of signals from your CGM sensor. This is true for all CGM sensors now on the market, independent of their manufacturer.

All glucose monitoring devices have a certain amount of error margin. Even a finger stick result has an error rate of 10-20 percent, depending on the equipment used to perform the measurement. You have diabetes should be considered while checking your blood glucose levels.

When comparing blood glucose measurements from a CGM sensor to blood glucose readings from a blood glucose meter, the CGM sensor results in a 15-minute delay (finger prick).

While using a CGM sensor and blood glucose meter simultaneously, especially after eating, you may find that your blood glucose levels are different between the two devices.

This is because glucose circulates throughout the body, first through the bloodstream and then disperses out into the interstitial fluid - a tiny amount of fluid that envelopes your tissue cells and lies just beneath the skin but above your blood vessels - before reaching the bloodstream. Glucose levels in the interstitial fluid are detected by CGM sensors, whereas arterial glucose levels are determined by blood glucose meters.

As a result, you should expect a slight delay in the data from your CGM sensor, although only by around 15 minutes. If you have any concerns about the results from your CGM sensor, you should double-check them with a blood glucose meter.

A continuous glucose monitor (CGM) sensor can be a helpful tool for monitoring your blood sugar levels throughout the day. However, it's not a terrible idea to double-check your blood glucose readings using a blood glucose meter, especially if you have any worries about your blood glucose readings from the CGM.

Blood glucose meters can be unreliable, depending on a wide range of variables, such as a person's diet and lifestyle. You may learn more about blood glucose monitoring devices and recommendations on the FDA's website.