I have absolutely nothing against CGMs, but the author confounds measurement error (which can happen in both blood tests as well as subcutaneous measurement which a CGM does), thresholding on a population level (I doubt anyone thinks an A1c of 4.5 and 5.6 are the same), and weak evidence of impact in actual health outcomes. It’s fun in the same way a Fitbit/Apple Watch is fun, but I don’t think one should oversell it’s utility.
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