Several studies have been conducted to support the accuracy of the FreeStyle Libre system:  The Performance and Usability of a Factory-Calibrated Flash Glucose Monitoring System¹ study (2015) evaluated the performance and usability of the FreeStyle Libre flash glucose monitoring system by comparing interstitial glucose results against finger prick glucose results.  Both the IMPACT² and the REPLACE³ studies showed that the FreeStyle Libre system could safely and successfully replace routine self-monitoring of blood glucose (SMBG) and delivers important clinical benefits.  Both the IMPACT² and the REPLACE³ studies showed that the FreeStyle Libre system could safely and successfully replace routine self-monitoring of blood glucose (SMBG) and delivers important clinical benefits.  The REPLACE study produced results that were published online in Diabetes Ther in 2016.  

References

1. Bailey T, Bode B, Christiansen M, Klaff L, Alva Sh. The Performance and Usability of a Factory-Calibrated Flash Glucose Monitoring System. Diabetes Technology &Therapeutics. 2015;17(11):787-794  

 2. Bolinder, et al. Novel glucose-sensing technology and hypoglycaemia in type 1 diabetes: a multicentre, non-masked, randomised controlled trial. The Lancet, published online, 12 Sept 16. 

3. Haak T, Hanaire H, Aijan R et al. Flash glucose-sensing technology as a replacement for blood glucose monitoring for the management of insulin-treated type 2 diabetes: a multicentre, open-label randomised controlled trial. [published online ahead of print December 20, 2016]. Diabetes Ther. 2017;8(1):55-73. doi:10.1007/s13300-016-0223-6.