Systematic review and meta-analysis of the associations of vegan and vegetarian diets with inflammatory biomarkers

Abstract Plant-based diets like vegetarian or vegan diets might influence circulating levels of inflammatory biomarkers, thereby reducing the risk of chronic diseases. This systematic review and meta-analysis aimed to investigate the associations of veganism and vegetarianism with circulating inflam...

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Autores principales: Juliane Menzel, Afraa Jabakhanji, Ronald Biemann, Knut Mai, Klaus Abraham, Cornelia Weikert
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Publicado: Nature Portfolio 2020
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Acceso en línea:https://doaj.org/article/ce84c45d8cb949beb72c5db6de233ba0
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spelling oai:doaj.org-article:ce84c45d8cb949beb72c5db6de233ba02021-12-02T11:43:36ZSystematic review and meta-analysis of the associations of vegan and vegetarian diets with inflammatory biomarkers10.1038/s41598-020-78426-82045-2322https://doaj.org/article/ce84c45d8cb949beb72c5db6de233ba02020-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-78426-8https://doaj.org/toc/2045-2322Abstract Plant-based diets like vegetarian or vegan diets might influence circulating levels of inflammatory biomarkers, thereby reducing the risk of chronic diseases. This systematic review and meta-analysis aimed to investigate the associations of veganism and vegetarianism with circulating inflammatory biomarkers in comparison to omnivores. Literature search was conducted in Pubmed and EMBASE until April 2020 and mean differences of biomarkers were assessed for: C-reactive protein (CRP), interleukin-6 (IL-6), interleukin-18 (IL-18), interleukin-1 receptor antagonist (IL-1 RA), tumor necrosis factor-alpha (TNF-ɑ), E-selectin, intercellular adhesion molecule-1 (ICAM-1), monocyte chemoattractant protein-1 (MCP-1), adiponectin, omentin-1 and resistin. Of initially identified 1073 publications, 21 cross-sectional studies met the inclusion criteria and were included in the systematic review and meta-analysis. Vegan diet was associated with lower levels of CRP compared to omnivores [mean difference − 0.54 mg/l, 95%-CI: − 0.79 to − 0.28, p < 0.0001]. This association was less pronounced in vegetarians [mean difference − 0.25 mg/l, 95%-CI: − 0.49 to 0.00, p = 0.05]. In patients with impaired kidney function, the association between vegetarian nutrition and CRP was much stronger with − 3.91 mg/l (95%-CI: − 5.23 to − 2.60; p < 0.0001). No substantial effects were observed for all other inflammatory biomarkers. Despite strong associations between CRP and a vegan or vegetarian diet were seen, further research is needed, as most inflammatory biomarkers were investigated only in single studies so far.Juliane MenzelAfraa JabakhanjiRonald BiemannKnut MaiKlaus AbrahamCornelia WeikertNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-11 (2020)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Juliane Menzel
Afraa Jabakhanji
Ronald Biemann
Knut Mai
Klaus Abraham
Cornelia Weikert
Systematic review and meta-analysis of the associations of vegan and vegetarian diets with inflammatory biomarkers
description Abstract Plant-based diets like vegetarian or vegan diets might influence circulating levels of inflammatory biomarkers, thereby reducing the risk of chronic diseases. This systematic review and meta-analysis aimed to investigate the associations of veganism and vegetarianism with circulating inflammatory biomarkers in comparison to omnivores. Literature search was conducted in Pubmed and EMBASE until April 2020 and mean differences of biomarkers were assessed for: C-reactive protein (CRP), interleukin-6 (IL-6), interleukin-18 (IL-18), interleukin-1 receptor antagonist (IL-1 RA), tumor necrosis factor-alpha (TNF-ɑ), E-selectin, intercellular adhesion molecule-1 (ICAM-1), monocyte chemoattractant protein-1 (MCP-1), adiponectin, omentin-1 and resistin. Of initially identified 1073 publications, 21 cross-sectional studies met the inclusion criteria and were included in the systematic review and meta-analysis. Vegan diet was associated with lower levels of CRP compared to omnivores [mean difference − 0.54 mg/l, 95%-CI: − 0.79 to − 0.28, p < 0.0001]. This association was less pronounced in vegetarians [mean difference − 0.25 mg/l, 95%-CI: − 0.49 to 0.00, p = 0.05]. In patients with impaired kidney function, the association between vegetarian nutrition and CRP was much stronger with − 3.91 mg/l (95%-CI: − 5.23 to − 2.60; p < 0.0001). No substantial effects were observed for all other inflammatory biomarkers. Despite strong associations between CRP and a vegan or vegetarian diet were seen, further research is needed, as most inflammatory biomarkers were investigated only in single studies so far.
format article
author Juliane Menzel
Afraa Jabakhanji
Ronald Biemann
Knut Mai
Klaus Abraham
Cornelia Weikert
author_facet Juliane Menzel
Afraa Jabakhanji
Ronald Biemann
Knut Mai
Klaus Abraham
Cornelia Weikert
author_sort Juliane Menzel
title Systematic review and meta-analysis of the associations of vegan and vegetarian diets with inflammatory biomarkers
title_short Systematic review and meta-analysis of the associations of vegan and vegetarian diets with inflammatory biomarkers
title_full Systematic review and meta-analysis of the associations of vegan and vegetarian diets with inflammatory biomarkers
title_fullStr Systematic review and meta-analysis of the associations of vegan and vegetarian diets with inflammatory biomarkers
title_full_unstemmed Systematic review and meta-analysis of the associations of vegan and vegetarian diets with inflammatory biomarkers
title_sort systematic review and meta-analysis of the associations of vegan and vegetarian diets with inflammatory biomarkers
publisher Nature Portfolio
publishDate 2020
url https://doaj.org/article/ce84c45d8cb949beb72c5db6de233ba0
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