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Determination of glycaemic index; some methodological aspects related to the analysis of carbohydrate load and characteristics of the previous evening meal

Granfeldt, Yvonne LU ; Wu, X and Björck, Inger LU (2006) In European Journal of Clinical Nutrition 60(1). p.104-112
Abstract
Objectives: To determine the possible differences in glycaemic index (GI) depending on ( 1) the analytical method used to calculate the 'available carbohydrate' load, that is, using carbohydrates by difference ( total carbohydrate by difference, minus dietary fibre (DF)) as available carbohydrates vs available starch basis ( total starch minus resistant starch (RS)) of a food rich in intrinsic RS and ( 2) the effect of GI characteristics and/or the content of indigestible carbohydrates ( RS and DF) of the evening meal prior to GI testing the following morning. Design: Blood glucose and serum insulin responses were studied after subjects consuming ( 1) two levels of barley kernels rich in intrinsic RS (15.2%, total starch basis) and ( 2)... (More)
Objectives: To determine the possible differences in glycaemic index (GI) depending on ( 1) the analytical method used to calculate the 'available carbohydrate' load, that is, using carbohydrates by difference ( total carbohydrate by difference, minus dietary fibre (DF)) as available carbohydrates vs available starch basis ( total starch minus resistant starch (RS)) of a food rich in intrinsic RS and ( 2) the effect of GI characteristics and/or the content of indigestible carbohydrates ( RS and DF) of the evening meal prior to GI testing the following morning. Design: Blood glucose and serum insulin responses were studied after subjects consuming ( 1) two levels of barley kernels rich in intrinsic RS (15.2%, total starch basis) and ( 2) after a standard breakfast following three different evening meals varying in GI and/or indigestible carbohydrates: pasta, barley kernels and white wheat bread, respectively. Subjects: Healthy adults with normal body mass index. Results: ( 1) Increasing the portion size of barley kernels from 79.6 g ( 50 g ` available carbohydrates') to 93.9 g ( 50 g available starch) to adjust for its RS content did not significantly affect the GI or insulin index (II). ( 2) The low GI barley evening meal, as opposed to white wheat bread and pasta evening meals, reduced the postprandial glycaemic and insulinaemic ( 23 and 29%, respectively, P<0.05) areas under the curve at a standardized white bread breakfast fed the following morning. Conclusion: ( 1) Increasing portion size to compensate for the considerable portion of RS in a low GI barley product had no significant impact on GI or II. However, for GI testing, it is recommended to base carbohydrate load on specific analyses of the available carbohydrate content. ( 2) A low GI barley evening meal containing high levels of indigestible carbohydrates ( RS and DF) substantially reduced the GI and II of white wheat bread determined at a subsequent breakfast meal. (Less)
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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
humans, methodological aspects, glycaemic index, glucose and insulin responses, second-meal tolerance, barley
in
European Journal of Clinical Nutrition
volume
60
issue
1
pages
104 - 112
publisher
Nature Publishing Group
external identifiers
  • pmid:16205745
  • wos:000235010900014
  • scopus:33645833630
  • pmid:16205745
ISSN
1476-5640
DOI
10.1038/sj.ejcn.1602273
language
English
LU publication?
yes
additional info
The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Applied Nutrition and Food Chemistry (011001300), Food Technology (011001017)
id
379b945b-3360-4c4f-8f1b-c54f2f7b6ac5 (old id 419485)
date added to LUP
2016-04-01 15:55:07
date last changed
2021-08-04 03:15:59
@article{379b945b-3360-4c4f-8f1b-c54f2f7b6ac5,
  abstract     = {Objectives: To determine the possible differences in glycaemic index (GI) depending on ( 1) the analytical method used to calculate the 'available carbohydrate' load, that is, using carbohydrates by difference ( total carbohydrate by difference, minus dietary fibre (DF)) as available carbohydrates vs available starch basis ( total starch minus resistant starch (RS)) of a food rich in intrinsic RS and ( 2) the effect of GI characteristics and/or the content of indigestible carbohydrates ( RS and DF) of the evening meal prior to GI testing the following morning. Design: Blood glucose and serum insulin responses were studied after subjects consuming ( 1) two levels of barley kernels rich in intrinsic RS (15.2%, total starch basis) and ( 2) after a standard breakfast following three different evening meals varying in GI and/or indigestible carbohydrates: pasta, barley kernels and white wheat bread, respectively. Subjects: Healthy adults with normal body mass index. Results: ( 1) Increasing the portion size of barley kernels from 79.6 g ( 50 g ` available carbohydrates') to 93.9 g ( 50 g available starch) to adjust for its RS content did not significantly affect the GI or insulin index (II). ( 2) The low GI barley evening meal, as opposed to white wheat bread and pasta evening meals, reduced the postprandial glycaemic and insulinaemic ( 23 and 29%, respectively, P&lt;0.05) areas under the curve at a standardized white bread breakfast fed the following morning. Conclusion: ( 1) Increasing portion size to compensate for the considerable portion of RS in a low GI barley product had no significant impact on GI or II. However, for GI testing, it is recommended to base carbohydrate load on specific analyses of the available carbohydrate content. ( 2) A low GI barley evening meal containing high levels of indigestible carbohydrates ( RS and DF) substantially reduced the GI and II of white wheat bread determined at a subsequent breakfast meal.},
  author       = {Granfeldt, Yvonne and Wu, X and Björck, Inger},
  issn         = {1476-5640},
  language     = {eng},
  number       = {1},
  pages        = {104--112},
  publisher    = {Nature Publishing Group},
  series       = {European Journal of Clinical Nutrition},
  title        = {Determination of glycaemic index; some methodological aspects related to the analysis of carbohydrate load and characteristics of the previous evening meal},
  url          = {http://dx.doi.org/10.1038/sj.ejcn.1602273},
  doi          = {10.1038/sj.ejcn.1602273},
  volume       = {60},
  year         = {2006},
}