Abstract Title:

A psyllium fiber-enriched meal strongly attenuates postprandial gastrointestinal peptide release in healthy young adults.

Abstract Source:

J Nutr. 2010 Apr;140(4):737-44. Epub 2010 Feb 10. PMID: 20147463

Abstract Author(s):

Leila J Karhunen, Kristiina R Juvonen, Sanna M Flander, Kirsi-Helena Liukkonen, Liisa Lähteenmäki, Maritta Siloaho, David E Laaksonen, Karl-Heinz Herzig, Matti I Uusitupa, Kaisa S Poutanen

Article Affiliation:

Food and Health Research Centre, Department of Clinical Nutrition, Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland. leila.karhunen@uef.fi

Abstract:

Dietary fiber (DF) and protein are essential constituents of a healthy diet and are well known for their high satiety impact. However, little is known about their influence on postprandial gastrointestinal (GI) peptide release. Our aim in this single-blind, randomized, cross-over study was to investigate the effects of DF and/or protein enrichments on satiety-related metabolic and hormonal responses. Sixteen healthy, nonobese volunteers participated in the study and ingested 1 of 5 isoenergetic test meals in a randomized order on separate days. The test meals were as follows: 1) low in protein (2.8 g) and fiber (7.6 g); 2) low in protein (2.6 g) and high in soluble fiber (psyllium, 23.0 g); 3) high in protein (soy, 19.7 g) and low in fiber (6.2 g); 4) high in protein (18.4 g) and fiber (23.0 g); and 5) white wheat bread. Serum insulin and plasma glucose, ghrelin, glucagon-like peptide 1 (GLP-1), and peptide YY (PYY) concentrations were determined for 2 h following the meals. In addition, hunger and satiety ratings were collected. Postprandial glucose, insulin, ghrelin, GLP-1, and PYY responses all differed among the meals (P

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