4.7 Article

Effects of Dietary Protein and Fiber at Breakfast on Appetite, ad Libitum Energy Intake at Lunch, and Neural Responses to Visual Food Stimuli in Overweight Adults

期刊

NUTRIENTS
卷 8, 期 1, 页码 -

出版社

MDPI
DOI: 10.3390/nu8010021

关键词

fMRI; food reward; overweight; appetite regulation; dietary protein; dietary fiber

资金

  1. American Egg Board/Egg Nutrition Center
  2. NIH Indiana Clinical and Translational Sciences Institute, Clinical Research Center [UL1TR001108]
  3. USDA [2011-38420-20038]
  4. NATIONAL CENTER FOR ADVANCING TRANSLATIONAL SCIENCES [UL1TR001108] Funding Source: NIH RePORTER
  5. NATIONAL INSTITUTE OF DIABETES AND DIGESTIVE AND KIDNEY DISEASES [R01DK103691, P30DK048520] Funding Source: NIH RePORTER
  6. NATIONAL INSTITUTE OF MENTAL HEALTH [R01MH102224] Funding Source: NIH RePORTER

向作者/读者索取更多资源

Increasing either protein or fiber at mealtimes has relatively modest effects on ingestive behavior. Whether protein and fiber have additive or interactive effects on ingestive behavior is not known. Fifteen overweight adults (5 female, 10 male; BMI: 27.1 +/- 0.2 kg/m(2); aged 26 +/- 1 year) consumed four breakfast meals in a randomized crossover manner (normal protein (12 g) + normal fiber (2 g), normal protein (12 g) + high fiber (8 g), high protein (25 g) + normal fiber (2 g), high protein (25 g) + high fiber (8 g)). The amount of protein and fiber consumed at breakfast did not influence postprandial appetite or ad libitum energy intake at lunch. In the fasting-state, visual food stimuli elicited significant responses in the bilateral insula and amygdala and left orbitofrontal cortex. Contrary to our hypotheses, postprandial right insula responses were lower after consuming normal protein vs. high protein breakfasts. Postprandial responses in other a priori brain regions were not significantly influenced by protein or fiber intake at breakfast. In conclusion, these data do not support increasing dietary protein and fiber at breakfast as effective strategies for modulating neural reward processing and acute ingestive behavior in overweight adults.

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