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Volume 14
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10.3390/nu14010148
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Article

Metabolic Response to Daytime Dry Fasting in Bahá’í Volunteers—Results of a Preliminary Study

by
Anja Mähler
1,2,3,4,*,
Carmen Jahn
1,
Lars Klug
1,
Caroline Klatte
5,
Andreas Michalsen
5,6,
Daniela Koppold-Liebscher
5,† and
Michael Boschmann
1,2,3,†
1
Experimental and Clinical Research Center (ECRC), a Cooperation between Charité—Universitätsmedizin Berlin and Max-Delbrück-Center for Molecular Medicine, 13125 Berlin, Germany
2
Berlin Institute of Health, Corporate Member of Freie Universität Berlin and Humboldt Universität zu Berlin, Charité—Universitätsmedizin Berlin, 10117 Berlin, Germany
3
Max-Delbrück-Center for Molecular Medicine (MDC) in the Helmholtz Association, 13125 Berlin, Germany
4
DZHK (German Centre for Cardiovascular Research), 10785 Berlin, Germany
5
Institute of Social Medicine, Epidemiology & Health Economics, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Charité—Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany
6
Department of Internal and Integrative Medicine, Immanuel Krankenhaus Berlin, 14109 Berlin, Germany
*
Author to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Nutrients 2022, 14(1), 148; https://doi.org/10.3390/nu14010148
Submission received: 10 December 2021 / Revised: 26 December 2021 / Accepted: 28 December 2021 / Published: 29 December 2021
(This article belongs to the Special Issue The Implication of Intermittent Fasting on Health and Diseases)
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Abstract

Each year in March, adherents of the Bahá’í faith abstain from eating and drinking from sunrise to sunset for 19 days. Thus, Bahá’í fasting (BF) can be considered as a form of daytime dry fasting. We investigated whether BF decreased energy expenditure after a meal and whether it improved anthropometric measures and systemic and tissue-level metabolic parameters. This was a self-controlled cohort study with 11 healthy men. We measured anthropometric parameters, metabolic markers in venous blood and pre- and postprandial energy metabolism at systemic (indirect calorimetry) and tissue (adipose tissue and skeletal muscle microdialysis) level, both before and during BF. During BF, we found reduced body weight, body mass index, body fat and blood glucose. Postprandial increase in energy expenditure was lower and diet-induced thermogenesis tended to be lower as well. In adipose tissue, perfusion, glucose supply and lipolysis were increased. In skeletal muscle, tissue perfusion did not change. Glucose supply and lipolysis were decreased. Glucose oxidation was increased, indicating improved insulin sensitivity. BF may be a promising approach to losing weight and improving metabolism and health. However, outside the context of religiously motivated fasting, skipping a meal in the evening (dinner cancelling) might be recommended, as metabolism appeared to be reduced in the evening.
Keywords: religious fasting; daytime dry fasting; energy expenditure; body composition; microdialysis religious fasting; daytime dry fasting; energy expenditure; body composition; microdialysis
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MDPI and ACS Style

Mähler, A.; Jahn, C.; Klug, L.; Klatte, C.; Michalsen, A.; Koppold-Liebscher, D.; Boschmann, M. Metabolic Response to Daytime Dry Fasting in Bahá’í Volunteers—Results of a Preliminary Study. Nutrients 2022, 14, 148. https://doi.org/10.3390/nu14010148

AMA Style

Mähler A, Jahn C, Klug L, Klatte C, Michalsen A, Koppold-Liebscher D, Boschmann M. Metabolic Response to Daytime Dry Fasting in Bahá’í Volunteers—Results of a Preliminary Study. Nutrients. 2022; 14(1):148. https://doi.org/10.3390/nu14010148

Chicago/Turabian Style

Mähler, Anja, Carmen Jahn, Lars Klug, Caroline Klatte, Andreas Michalsen, Daniela Koppold-Liebscher, and Michael Boschmann. 2022. "Metabolic Response to Daytime Dry Fasting in Bahá’í Volunteers—Results of a Preliminary Study" Nutrients 14, no. 1: 148. https://doi.org/10.3390/nu14010148

APA Style

Mähler, A., Jahn, C., Klug, L., Klatte, C., Michalsen, A., Koppold-Liebscher, D., & Boschmann, M. (2022). Metabolic Response to Daytime Dry Fasting in Bahá’í Volunteers—Results of a Preliminary Study. Nutrients, 14(1), 148. https://doi.org/10.3390/nu14010148

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