Consumer continuous glucose monitoring uncovers hidden metabolic risk in free-living adults without diabetes

Whether continuous glucose monitoring (CGM) provides actionable information in adults without diabetes is contested, as its metrics were designed for diabetes and screening relies on HbA1c. In this cross-sectional study of 62,122 free-living adults on the Levels digital-health platform, average glucose was the most reliable measure across weeks (intraclass correlation 0.747). Among 7,930 participants without diabetes with laboratory data, it tracked insulin resistance, triglycerides, HDL cholesterol, uric acid, and C-reactive protein more closely than HbA1c, explaining nearly three times more

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