# Continuous glucose monitor (CGM)

A continuous glucose monitor (CGM) is a wearable sensor that tracks your blood sugar around the clock. It usually sits just under your skin and reads interstitial glucose every few minutes. Most stick-on sensors last about 7 to 14 days (it depends on the system), while implantable ones like Eversense 365 can last up to a year. A CGM gives you trend data: fasting, after-meal, and overnight glucose, plus 'time in range' and how much your glucose swings. More and more non-diabetic adults use them to personalize their nutrition and fine-tune longevity-minded lifestyle choices.

## Sources

- Uhl S, Choure A, Rouse B, Loblack A, Reaven P. (2024). Effectiveness of Continuous Glucose Monitoring on Metrics of Glycemic Control in Type 2 Diabetes Mellitus: A Systematic Review and Meta-analysis. Journal of Clinical Endocrinology & Metabolism. https://doi.org/10.1210/clinem/dgad652
- Seidu S, Kunutsor SK, Ajjan RA, Choudhary P. (2024). Efficacy and Safety of Continuous Glucose Monitoring and Intermittently Scanned Continuous Glucose Monitoring in Patients With Type 2 Diabetes. Diabetes Care. https://doi.org/10.2337/dc23-1520

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