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Nutrients 2019, 11(2), 247; https://doi.org/10.3390/nu11020247

Whey Proteins Reduce Appetite, Stimulate Anorexigenic Gastrointestinal Peptides and Improve Glucometabolic Homeostasis in Young Obese Women

1
Department of Clinical Sciences and Community Health, University of Milan, via Vanvitelli 32, 20129 Milan, Italy
2
Department of Medical Biotechnologies, University of Siena, 53100 Siena, Italy
3
Ferdinando Santarelli Foundation, 20122 Milan, Italy
4
Department of Medical Biotechnologies and Translational Medicine, University of Milan, 20133 Milan, Italy
5
Istituto Auxologico Italiano, IRCCS, Experimental Laboratory for Auxo-endocrinological Research, 28824 Piancavallo (VB), Italy
6
Istituto Auxologico Italiano, IRCCS, Division of Auxology and Metabolic Diseases, 28824 Piancavallo (VB), Italy
*
Author to whom correspondence should be addressed.
Received: 18 December 2018 / Revised: 11 January 2019 / Accepted: 20 January 2019 / Published: 23 January 2019
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Abstract

Introduction: Proteins, particularly whey proteins, represent the most satiating macronutrient in animals and humans. A dietetic regimen based on proteins enriched preload before eating might be a strategy to counteract obesity. Aims and Methods: The aim of the present study was to evaluate the effects of an isocaloric drink containing whey proteins or maltodextrins (preload) on appetite (satiety/hunger measured by a visual analogue scale or VAS), glucometabolic control (blood glucose/insulin), and anorexigenic gastrointestinal peptides (pancreatic polypeptide or PP, glucagon-like peptide 1 or GLP-1 and peptide YY or PYY) in a cohort of obese young women (n = 9; age: 18.1 ± 3.0 years; body mass index, BMI: 38.8 ± 4.5 kg/m2). After two and a half hours, they were administered with a mixed meal at a fixed dose; satiety and hunger were measured by VAS. Results: Each drink significantly augmented satiety and reduced hunger, and the effects were more evident with whey proteins than maltodextrins. Similarly, there were significant increases in GLP-1 and PYY levels (but not PP) after the ingestion of each drink; these anorexigenic responses were higher with whey proteins than maltodextrins. While insulinemia identically increased after each drink, whey proteins induced a lower glycemic response than maltodextrins. No differences in satiety and hunger were found after the meal, which is presumably due to the late administration of the meal test, when the hypophagic effect of whey proteins was disappearing. Conclusions: While whey proteins actually reduce appetite, stimulate anorexigenic gastrointestinal peptides, and improve glucometabolic homeostasis in young obese women, further additional studies are mandatory to demonstrate their hypophagic effects in obese subjects, when administered as preload before eating. View Full-Text
Keywords: whey proteins; maltodextrins; obesity; appetite; anorexigenic gastrointestinal peptides; insulin; glucose; amino acids whey proteins; maltodextrins; obesity; appetite; anorexigenic gastrointestinal peptides; insulin; glucose; amino acids
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Rigamonti, A.E.; Leoncini, R.; Casnici, C.; Marelli, O.; De Col, A.; Tamini, S.; Lucchetti, E.; Cicolini, S.; Abbruzzese, L.; Cella, S.G.; Sartorio, A. Whey Proteins Reduce Appetite, Stimulate Anorexigenic Gastrointestinal Peptides and Improve Glucometabolic Homeostasis in Young Obese Women. Nutrients 2019, 11, 247.

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