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Diurnal trends in responses of blood plasma concentrations of glucose, insulin, and C-peptide following high- and low-fat meals and their relation to fat metabolism in healthy middle-aged volunteers

Published online by Cambridge University Press:  24 July 2007

David L. Frape ,
Norman R. Williams ,
A. J. Scriven ,
Christopher R. Palmer ,
Kathryn O'Sullivan  and
Reginald J. Fletcher
David L. Frape
Affiliation:
N.S. Research, The Priory, Mildenhall, Suffolk, IP28 7EE
Norman R. Williams
Affiliation:
Pathology Department, Papworth Hospital, Cambridge CB3 8RE
A. J. Scriven
Affiliation:
Pathology Department, Papworth Hospital, Cambridge CB3 8RE
Christopher R. Palmer
Affiliation:
University of Cambridge, Department of Community Medicine, Institute of Public Health, Robinson Way, Cambridge CB2 2SR
Kathryn O'Sullivan
Affiliation:
The Kellogg Company of Great Britain Ltd, The Kellogg Building, Talbot Road, Manchester M16 OPU
Reginald J. Fletcher
Affiliation:
The Kellogg Company of Great Britain Ltd, The Kellogg Building, Talbot Road, Manchester M16 OPU
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Abstract

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An experiment was conducted in twelve healthy middle-aged volunteers, six of each sex, with a mean BMI of 27kg/m2 to detect differences between morning and afternoon in postprandial blood glucose, insulin and C-peptide concentrations. These responses were measured following the consumption of isoenergetic meals that were high or low in fat content, at breakfast and at lunch. Over 4d each subject received the high-carbohydrate (L, 5·5 g mixed fat/meal) and moderately high-fat (M, 33 g mixed fat/meal) breakfasts and lunches, in three combinations (LL, MM, LM), or they fasted at breakfast time and received a moderately high-fat lunch (NM), in three Latin squares. Each evening a standard meal was given. Plasma glucose, insulin and C-peptide responses were greater following L than M meals and within both MM and LL treatments insulin and C-peptide responses were greater following breakfast than following lunch. The incremental C-peptide response to a fatty lunch following a fast at breakfast time (NM) was similar to that to a fatty breakfast, but the incremental insulin response for the same comparison was marginally lower at lunch (P=0·06). The relationship of C-peptide and insulin concentrations was assessed. Plasma glucose response to a fatty lunch was increased by a fatty breakfast. The relationships of these metabolic events with fat metabolism are discussed.

Keywords

Dietary fatDietary carbohydratePlasmaInsulinDiurnal change
Type
Human and Clinical Nutrition
Information
British Journal of Nutrition , Volume 77 , Issue 4 , April 1997 , pp. 523 - 535
Copyright
Copyright © The Nutrition Society 1997

References

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