Getting a snapshot of your body&#x27;s ability to metabolize carbohydrates is a much more granular view into metabolic health than are &#x27;summary statistics&#x27; like A1C.  Continuous glucose monitors, like those by Dexcom, are especially valuable -- you can get a detailed characterization of insulin response to food, of energy mobilization during exercise of different intensities, of general systemic stress, etc.<p>People are coming around on glucose in the same way that we now understand that the cardio signal (preferably using a sensitive measure like ECG, but even with crappy PPG sensors) are predictive of an enormous number of physiological and psychological phenomena.