CGMs for Non-Diabetics: A Biofeedback Toy, Not a Diagnostic

Summary

For a healthy non-diabetic, a continuous glucose monitor is an **n-of-1 biofeedback toy, not a diagnostic** — it accurately shows that brief post-meal glucose rises are normal physiology, but there is **no evidence that acting on those readings improves any hard health outcome** in people with normal glucose, no validated interpretive thresholds inside the normal range, and a real risk of manufacturing spike-anxiety or orthorexia; useful as a **time-limited awareness experiment** (Tier 3), while the wellness claims that "spikes harm healthy people" or that "flattening your curve" makes you hea