Continuous glucose monitor

Covers how continuous glucose monitors (CGMs) track blood sugar trends in real time and what those patterns can reveal about diet, training, sleep, and stress. Useful for optimizing body composition, energy, and metabolic health, especially when pursuing performance and longevity goals.

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Keto diet and CGM: What your glucose level can look like and how to avoid reverse metabolic inflexibility

Dr. Susan Carter, MD: Endocrinologist & Longevity Expert

Feb 07, 2026 · 11 min read

On a ketogenic diet, CGM traces usually show a lower, flatter 24‑hour glucose curve, while a rare high‑carb meal can cause a higher peak and slower return to baseline because fat adaptation temporarily downshifts rapid glucose disposal (“reverse metabolic inflexibility”) rather than proving true insulin resistance. Learn how to interpret trends despite interstitial‑fluid lag and ...

CGM for nondiabetics: When it helps, when it misleads, and how men can use it well

Dr. Susan Carter, MD: Endocrinologist & Longevity Expert

Dec 17, 2025 · 12 min read

In nondiabetic men, a CGM is most useful when diabetes risk is elevated and you use it to track repeatable trends (it reads glucose in interstitial fluid every few minutes), but it can mislead when you treat one-off post-meal “spikes” as verdicts because readings lag behind blood glucose and responses can vary even to the ...