Effect of reducing portion size at a compulsory meal on later energy intake, gut hormones, and appetite in overweight adults. (5th June 2015)

• Record Type: Journal Article
• Authors: Lewis, Hannah B.; Ahern, Amy L.; Solis‐Trapala, Ivonne; Walker, Celia G.; Reimann, Frank; Gribble, Fiona M.; Jebb, Susan A
• Is Part Of: Obesity. Volume 23:Number 7(2015:Jul.)
• Page Start: 1362
• Page End: 1370
• Publication Date: 2015-06-05
• Subjects: Obesity -- Periodicals; 616.398005
• DOI: 10.1002/oby.21105
• Languages: English
• ISSNs: 1930-7381

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="oby21105-sec-0001" sec-type="section"> <title>Objective</title> <p>Larger portion sizes (PS) are associated with greater energy intake (EI), but little evidence exists on the appetitive effects of PS reduction. This study investigated the impact of reducing breakfast PS on subsequent EI, postprandial gastrointestinal hormone responses, and appetite ratings.</p> </sec> <sec id="oby21105-sec-0003" sec-type="section"> <title>Methods</title> <p>In a randomized crossover design (<italic>n</italic> = 33 adults; mean BMI 29 kg/m<sup>2</sup>), a compulsory breakfast was based on 25% of gender‐specific estimated daily energy requirements; PS was reduced by 20% and 40%. EI was measured at an <italic>ad libitum</italic> lunch (240 min) and snack (360 min) and by weighed diet diaries until bed. Blood was sampled until lunch in 20 participants. Appetite ratings were measured using visual analogue scales.</p> </sec> <sec id="oby21105-sec-0004" sec-type="section"> <title>Results</title> <p>EI at lunch (control: 2, 930 ± 203; 20% reduction: 2, 853 ± 198; 40% reduction: 2, 911 ± 179 kJ) and over the whole day except breakfast (control: 7, 374 ± 361; 20% reduction: 7, 566 ± 468; 40% reduction: 7, 413 ± 417 kJ) did not differ. Postprandial PYY, GLP‐1, GIP, insulin, and fullness profiles were lower and hunger, desire to eat, and prospective consumption higher following 40% reduction compared to control. Appetite ratings profiles, but not hormone concentrations, were associated with subsequent EI.</p> </sec> <sec id="oby21105-sec-0005" sec-type="section"> <title>Conclusions</title> <p>Smaller portions at breakfast led to reductions in gastrointestinal hormone secretion but did not affect subsequent energy intake, suggesting small reductions in portion size may be a useful strategy to constrain EI.</p> </sec> </abstract>