Continuous Glucose Monitoring

topic

Continuous glucose monitors (CGMs) are wearable devices that measure interstitial glucose continuously (every 5–15 minutes) via a subcutaneous filament sensor — providing the first practical window into real-time personal glycemic response to specific foods, meals, stress events, sleep quality, and exercise, allowing individuals to directly observe how their unique metabolic profile responds to dietary choices rather than relying on population-average glycemic index values.

Role

CGMs represent the most significant development in practical nutrition self-monitoring since the invention of the calorie — providing the individual with objective, personalized, real-time feedback about how their body specifically responds to food rather than population-average estimates that may not apply to them. The Weizmann Institute's personalized nutrition research, using CGM data from 800 participants, showed that individuals who appear to have identical glucose responses to population-average predictions show massive individual variation — with some responding poorly to 'healthy' foods and well to 'unhealthy' ones in ways completely invisible without continuous monitoring. While primarily used for diabetes management, CGM use in metabolically healthy individuals is the most sophisticated personal nutrition tool currently available.

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