Differences in Glucose Readings Between Right Arm and Left Arm Using a Continuous Glucose Monitor.

Continuous glucose monitoring (CGM) devices are used for evaluating real-time glucose levels to optimize diabetes management. There is limited information, however, on whether readings differ when a device is placed on the right versus the left arm. This study evaluated the mean difference in glucose levels between the right and left arm and the effect of unilateral arm exercise on this difference. The effect of an intermittent fasting diet on body fat percentage was also evaluated. In a prospective trial, 46 adult volunteers self-selected into the intermittent fasting (IF; The mean glucose level in the right arm was significantly higher than the left arm by 3.7 mg/dL ( Measured glucose level and time in euglycemic range differ per placement of the CGM device, and the implications of this difference should be considered in clinical practice and research.