Ben Greenfield Fitness: Diet, Fat Loss And Performance

bengreenfieldfitness.com/levels As I've mentioned many times before on podcasts, I've been using something called a "Continuous Glucose Monitor" (CGM) at various intervals throughout my life for about 4 years or so.     Considering that, as I write about here, I consider glycemic variability (which is exactly what these CGM's track) and inflammation (which is a bit more difficult to measure as it typically requires a visit to a lab) to be my top two key biomarkers for health and longevity, my use of a CGM has given me some very valuable data on how my body responds to certain foods, supplements, exercises, lifestyle practices, and even emotions. But how does a CGM work, exactly?  What does the really tiny "filamentous" needle actually measure? How do you get yours to "stick" for long periods of time, or in water?  How does the phone gather data from the sensor, and is EMF a concern? Does the sensor have to be calibrated to a blood glucose reading due to the fact it is recording interstitial fluid vs. blood?