Effects of single plant-based vs. animal-based meals on satiety and mood in 
real-world smartphone-embedded studies

Medawar, Evelyn; Zedler, M.; de Biasi, L.; Villringer, Arno; Witte, A. Veronica

doi:10.1038/s41538-022-00176-w

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Effects of single plant-based vs. animal-based meals on satiety and mood in real-world smartphone-embedded studies

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Medawar, Evelyn
Department Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society;
Berlin School of Mind and Brain, Humboldt University Berlin, Germany;
Charité University Medicine Berlin, Germany;

Zedler, M.
Department Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society;

de Biasi, L.
Department Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society;

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Villringer, Arno
Department Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society;
Berlin School of Mind and Brain, Humboldt University Berlin, Germany;
Charité University Medicine Berlin, Germany;
Clinic for Cognitive Neurology, University of Leipzig, Germany;

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Witte, A. Veronica
Department Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society;
Clinic for Cognitive Neurology, University of Leipzig, Germany;

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Citation

Medawar, E., Zedler, M., de Biasi, L., Villringer, A., & Witte, A. V. (2023). Effects of single plant-based vs. animal-based meals on satiety and mood in real-world smartphone-embedded studies. npj Science of Food, 7(1): 1. doi:10.1038/s41538-022-00176-w.

Cite as: https://hdl.handle.net/21.11116/0000-000B-F30E-4

Abstract

Adopting plant-based diets high in fiber may reduce global warming and obesity prevalence. Physiological and psychological determinants of plant-based food intake remain unclear. As fiber has been linked with improved gut-brain signaling, we hypothesized that a single plant-based (vegetarian and vegan) compared to an animal-based (animal flesh) meal, would induce higher satiety, higher mood and less stress. In three large-scale smartphone-based studies, adults (nall = 16,379) ranked satiety and mood before and after meal intake. Meal intake induced satiety and higher mood. Plant-based meal choices did not explain differences in post-meal hunger. Individuals choosing a plant-based meal reported slightly higher mood before and smaller mood increases after the meal compared to those choosing animal-based meals. Protein content marginally mediated post-meal satiety, while gender and taste ratings had a strong effect on satiety and mood in general. We could not detect the profound effects of plant-based vs. animal-based meals on satiety and mood.