Nutrition
Fasting Glucose Response
Fasting glucose response tracks overnight and break-fast blood sugar on intermittent fasting—meal quality at the first bite shapes spikes as much as fast length.
Fasting glucose response describes how blood sugar behaves overnight and into the eating window—some people see stable dawn glucose on time-restricted eating; others spike at break-fast if the first meal is mostly sugar. CGM helps compare window shifts versus identical meals.
Fasting glucose is one metric, not a score for fasting purity.
Common questions
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Why does glucose spike after break-fast?
Refeeding after hours without food plus high-glycemic first bites can spike readings—add protein, fiber, and walk ten minutes after the first meal to blunt the rise.
Related terms
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