Dexcom Continuous Glucose Monitoring System

The Dexcom CGM ecosystem, headlined by the G7 and the over-the-counter Stelo, represents the gold standard in biosensing technology for 2026. Architecturally, the system utilizes a high-fidelity electrochemical sensor that measures interstitial fluid glucose every five minutes, transmitting data via Bluetooth Low Energy (BLE) to smartphones or integrated medical devices. The G7 model features a Mean Absolute Relative Difference (MARD) of approximately 8.2%, providing market-leading accuracy for insulin-dependent users. The platform’s 2026 market position is defined by its transition from a strictly clinical tool to a foundational layer for metabolic health platforms. With 'Direct-to-Watch' capabilities and a robust Cloud API (Dexcom Clarity), it facilitates a closed-loop ecosystem when paired with Automated Insulin Delivery (AID) systems like the Tandem t:slim X2 and Omnipod 5. For the non-insulin market, the Stelo sensor offers a 15-day wear time with a simplified software interface focused on lifestyle and dietary impact. The system’s predictive 'Urgent Low Soon' alert utilizes trend-analysis algorithms to prevent hypoglycemia 20 minutes before it occurs, a critical safety feature that differentiates it from intermittent flash monitoring systems.