Nutrition
Glycemic Index Limitations
Glycemic index limitations mean lab rankings miss portion size, mixed meals, sleep, and personal response—pair GI with GL and real logs.
Glycemic index limitations include portion blindness, individual response swings, and lab conditions that rarely match your Tuesday lunch—fat, protein, fiber, vinegar, and a ten-minute walk all blunt spikes tables ignore. Ripened fruit, reheated potatoes, and sleep debt change your curve without changing the chart.
GI still helps rank similar foods; it is not a personal prescription.
Common questions
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Is a high glycemic index food always bad?
No—fast carbs can support performance before or during long sessions. High GI is a problem when portions are large and you're sedentary, not when fueling hard work.
Related terms
Put Glycemic Index Limitations into practice
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