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Effect of postprandial modulation of glucose availability: short- and long-term analysis

  • Julie-Anne Nazare (a1) (a2) (a3) (a4) (a5) (a6), Alexis de Rougemont (a1) (a2) (a3) (a4) (a5) (a6), Sylvie Normand (a1) (a2) (a3) (a4) (a5) (a6), Valérie Sauvinet (a1) (a2) (a3) (a4) (a5) (a6), Monique Sothier (a1) (a2) (a3) (a4) (a5) (a6), Sophie Vinoy (a7), Michel Désage (a1) (a2) (a3) (a4) (a5) (a6) and Martine Laville (a1) (a2) (a3) (a4) (a5) (a6)...

Low glycaemic index (LGI) foods have been proposed as potential means to decrease postprandial glucose excursions and thus to improve diabetes management. We modulated glucose availability of cereal products and thus their glycaemic index to study the metabolic effect of LGI foods on daylong glucose control acutely and in the long term following a 5-week GI intervention diet in free-living subjects. In this randomised, parallel trial, two groups of nineteen overweight subjects followed an ad libitum 5-week intervention diet in which usual starch was replaced by either LGI or high GI (HGI) starch. During the exploration days (days 1 and 36), subjects ate their assigned 13C-labelled test breakfast (LGI or HGI), and total and exogenous glucose kinetics (using stable isotopes), postprandial concentrations of glucose, insulin, lipid profile and nutrient oxidation were assessed after the test breakfast and a standardised lunch. At day 1, LGI breakfast significantly decreased post-breakfast glycaemic response with a parallel decrease in exogenous and total glucose appearance (P < 0·05). Post-lunch and post-breakfast glycaemic responses were positively correlated (r 0·79, P < 0·0001). Following the 5-week diet, difference between the groups in terms of glucose kinetics and response was maintained (no significant interaction group × time) but tended to decrease over time for the post-breakfast glycaemic response. Post-lunch and post-breakfast glycaemic responses remained positively correlated (r 0·47, P = 0·004). Modulation of postprandial glucose availability at breakfast decreased plasma exogenous glucose appearance and improved glucose control at the subsequent lunch. After 5 weeks, these effects were maintained in healthy subjects but remained to be confirmed in the longer term.

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Corresponding author
*Corresponding author: Professor Martine Laville, fax +33 4 78 86 44 62, email
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British Journal of Nutrition
  • ISSN: 0007-1145
  • EISSN: 1475-2662
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