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Parameters controlling the glycaemic response to breads

Published online by Cambridge University Press:  14 December 2007

Anthony Fardet ,
Fanny Leenhardt ,
Delphine Lioger ,
Augustin Scalbert  and
Christian Rémésy
Anthony Fardet*
Affiliation:
Unité des Maladies Métaboliques et Micronutriments, U3M, INRA, Centre de Recherche de Clermont-Ferrand/Theix, 63122 Saint-Genès-Champanelle, France
Fanny Leenhardt
Affiliation:
Unité des Maladies Métaboliques et Micronutriments, U3M, INRA, Centre de Recherche de Clermont-Ferrand/Theix, 63122 Saint-Genès-Champanelle, France
Delphine Lioger
Affiliation:
Unité des Maladies Métaboliques et Micronutriments, U3M, INRA, Centre de Recherche de Clermont-Ferrand/Theix, 63122 Saint-Genès-Champanelle, France
Augustin Scalbert
Affiliation:
Unité des Maladies Métaboliques et Micronutriments, U3M, INRA, Centre de Recherche de Clermont-Ferrand/Theix, 63122 Saint-Genès-Champanelle, France
Christian Rémésy
Affiliation:
Unité des Maladies Métaboliques et Micronutriments, U3M, INRA, Centre de Recherche de Clermont-Ferrand/Theix, 63122 Saint-Genès-Champanelle, France
*
*Corresponding author: Dr Anthony Fardet, fax +33 47 3 62 46 38, email afardet@clermont.inra.fr
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Abstract

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Bread is one of the most widely consumed staple foods worldwide. White-wheat bread, largely consumed in France, is made from highly refined flour, which leads to a low nutrient density. Due to a highly porous structure and gelatinised starch, it is easily broken down during digestion, leading to a rapid increase of glucose released into the bloodstream. Low glycaemic responses are considered favourable to health, especially against a background of diabetes. Literature reports show that selection of raw material is an essential factor in decreasing the glycaemic index (GI) of white bread. There are two means of decreasing the rate of starch degradation: either (i) slowing gastric emptying rate and/or glucose diffusion–absorption through the intestinal mucosa, which can be achieved by incorporating soluble fibre or organic acid in bread, or (ii) limiting starch accessibility to α-amylase by using high-amylose cereal varieties and/or incorporating intact cereal grains. Studies on cereal products show that preservation of the food structure during digestion seems to be a more important GI-reducing factor than the degree of starch crystallinity or the presence of soluble fibre. Thus, we should look to produce bread with a more compact food structure or higher density, which is the case in leavened wholewheat bread or bread with intact cereal grains. The baking process should also be improved to achieve this goal, by using, for example, a reduced kneading time or less yeast than usual.

Keywords

BreadsGlycaemic indexFood structure

Information

Type
Research Article
Information
Nutrition Research Reviews , Volume 19 , Issue 1 , June 2006 , pp. 18 - 25
Copyright
Copyright © The Authors 2006

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