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Glucose Ketone Index

Meaning

A clinical biomarker calculated as the ratio of blood glucose concentration (in mg/dL or mmol/L) divided by blood ketone concentration (in mmol/L), providing a single, comprehensive metric of metabolic state. This index reflects the balance between glucose utilization and ketone body production, serving as a critical indicator of metabolic flexibility, insulin sensitivity, and the therapeutic efficacy of ketogenic or fasting protocols. Lower values generally correlate with a more metabolically advantageous state, often seen in longevity research.