Story perspectives

Users Report Inaccuracies in Dexcom G7 Glucose Monitors

12/10/2025

Summary

Story summary

Dan Heller tested Dexcom's G7 continuous glucose monitor in early 2023 and found erratic readings and connection failures.
His findings were echoed by many users and spurred class action lawsuits alleging misleading advertising by Dexcom.
Dexcom markets the G7 as highly accurate, but real-world performance shows discrepancies with clinical trial results.
Abbott recalled 3 million CGMs due to inaccuracies, prompting experts to call for standardized testing to improve CGM reliability.

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Story summary

Dan Heller tested Dexcom's G7 continuous glucose monitor in early 2023 and found erratic readings and connection failures.
His findings were echoed by many users and spurred class action lawsuits alleging misleading advertising by Dexcom.
Dexcom markets the G7 as highly accurate, but real-world performance shows discrepancies with clinical trial results.
Abbott recalled 3 million CGMs due to inaccuracies, prompting experts to call for standardized testing to improve CGM reliability.