. 2020 Sep 28;14(6):1035–1064. doi: 10.1177/1932296820954163

Table 2.

List of Currently Available Subcutaneous CGM Devices and their Interferences.

CGM system	Glucose sensing methods	Technical features⁴	Known interferences from chemical substances
Abbott Diabetes Care FreeStyle Libre 14 day system²⁸	GO + Redox Sensing Membrane	No required calibration; warm-up 1 hour; 14 days of sensor wear; range 40-500 mg/dL; no predictive alerts; requires scanning at least every 8 hours	Ascorbic acid Salicylic acid
Abbott Diabetes Care FreeStyle Libre 2^29,30	GO + Redox Sensing Membrane	No required calibration; warm-up 1 hour; 14 days of sensor wear; range 40-400 mg/dL; no predictive alerts; optional alarms for hypoglycemia, hyperglycemia, and signal loss; requires scanning at least every 8 hours	Ascorbic acid
Dexcom G6^31,32	GO + Perm-selective membrane coating	No required calibrations; warm-up 2 hours; 10 days of sensor wear; range 40-400 mg/dL; hypoglycemia predictive alerts	Hydroxyurea
Medtronic MiniMed Guardian Sensor 3^34,35	GO	Requires 2-4 calibrations/day; warm-up 2 hours; 7 days of sensor wear; range 40- 400 mg/dL; predictive alerts	Acetaminophen
Senseonics Eversense^36,37	Nonenzymatic electrochemical fluorescent-based polymer	Required 2 calibrations/day; implantable; warm-up 24 hours; 90-180 days of sensor wear; predictive alerts for hypoglycemia and hyperglycemia; conditional MRI compatibility	Mannitol Tetracycline

GO, glucose oxidase; MRI, magnetic resonance imaging.