Research
Macro partitioning
The method of calculating 'available carbohydrate' significantly impacts GI values, with newer methods accurately measuring resistant starch (RS) preventing the overestimation of GI in foods with indigestible fibers.
Be aware that older GI values might be slightly inaccurate for foods high in resistant starch (like cooled potatoes or legumes). Newer testing methods provide more accurate GI scores by accounting for indigestible fibers.
GoodSupportsHIGH confidence
The former AOAC analytical dietary fibre method did not measure type 3 RS appropriately, leading to some underestimation of the total RS content of many foods in the past... measuring available CHO is no longer a problem for most common foods.
Why this rating
Based on analytical method validation and comparison of old vs new standards.
Source
Glycaemic index methodology
Fred Brouns et al. · Nutrition Research Reviews · 2005
DOI 10.1079/nrr2005100
narrative_reviewCited 1,046×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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