CGM Device Comparison
Compare and contrast FDA-approved CGM systems to find what is right for each individual patient and your practice.
Personal CGM Devices
Abbott FreeStyle Libre 2
Measures and sends glucose readings to reader/smart device every 1 minute
Unblinded
≥ 4 yrs
Back of Upper Arm
14 days
No
1 hr
> 500 mg of Vitamin C per day
Yes
Abbott FreeStyle Libre 2 Plus
Measures and sends glucose readings to reader/smart device every 1 minute
Unblinded
≥ 2 yrs
Back of Upper Arm
15 days
No
1 hr
> 1000 mg of Vitamin C per day
Yes
Abbott FreeStyle Libre 14 day
Measures and sends glucose readings to reader/smart device every 1 minute
Unblinded
≥ 18 yrs
Back of Upper Arm
14 days
No
1 hr
Ascorbic acid; salicylic acid
No; trend arrows
Abbott FreeStyle Libre 3
Measures and sends glucose readings to reader/smart device every 1 minute
Unblinded
≥ 4 yrs
Back of Upper Arm
14 days
No
1 hr
> 500 mg of Vitamin C per day
Yes
Abbott FreeStyle Libre 3 Plus
Measures and sends glucose readings to reader/smart device every 1 minute
Unblinded
≥ 2 yrs
Back of Upper Arm
15 days
No
1 hr
> 1000 mg of Vitamin C per day
Yes
Dexcom G6
Glucose readings sent to receiver/smart device every 5 minutes
Unblinded
≥ 2 yrs
Abdomen (Also, upper buttocks for patients 2-17 yrs)
10 days
No
2 hr
Hydroxyurea; high dose acetaminophen (> 1 g every 6 hrs in adults)
Yes
Dexcom G7
Glucose readings sent to receiver/smart device every 5 minutes
Unblinded
≥ 2 yrs
Back of upper arm ( also, upper buttocks for patients 2-6 years)
10 days
No
30 min
Hydroxyurea; high dose acetaminophen (> 1 g every 6 hrs in adults)
Yes
Medtronic Guardian Connect
Glucose readings sent to smart device every 5 minutes
Unblinded
14-75 yrs
Abdomen or back of upper arm
7 days
Yes (After initialization, at least every 12 hrs)
2 hr
Acetaminophen or paracetamol
Yes
Professional CGM Devices
Dexcom G6 Pro
Glucose readings sent to receiver/smart device every 5 minutes
Blinded or unblinded
≥ 2 yrs
Abdomen (Also, upper buttocks for patients 2-17 yrs)
10 days
No
2 hr
Hydroxyurea; high dose acetaminophen (> 1 g every 6 hrs in adults)
Yes (unblinded)