Difference B/w Finger Prick & Continous Blood Glucose Readin

Learn about the differences in readings from finger prick & continuous glucose readings.
Sensor glucose readings, taken by FreeStyle Libre sensors, reflect glucose levels in the interstitial fluid (ISF) rather than directly in the blood, and typically lag behind a finger-prick blood glucose reading by approximately 2.4 to 4.6 minutes.

When glucose levels are changing rapidly—such as after meals or during exercise—sensor readings may differ from blood glucose (e.g., appearing lower during rising levels and higher during falling levels), although when levels are stable, both readings align closely.