Can soy isoflavones in combination with soy protein change serum levels of C-reactive protein among patients with chronic inflammatory diseases? A systematic review and meta-analysis on randomized controlled trials

Abstract Background C-reactive protein (CRP) is one of the most important markers for assessing inflammation status and its increased concentration in blood is associated with many chronic diseases in humans. The aim of this study was to reveal the effect of soy isoflavones containing soy protein on...

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Main Authors: Ali Gholami, Bahareh Amirkalali, Mitra Hariri
Format: Article
Language:English
Published: BMC 2025-05-01
Series:Journal of Health, Population and Nutrition
Subjects:
Online Access:https://doi.org/10.1186/s41043-025-00902-6
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author Ali Gholami
Bahareh Amirkalali
Mitra Hariri
author_facet Ali Gholami
Bahareh Amirkalali
Mitra Hariri
author_sort Ali Gholami
collection DOAJ
description Abstract Background C-reactive protein (CRP) is one of the most important markers for assessing inflammation status and its increased concentration in blood is associated with many chronic diseases in humans. The aim of this study was to reveal the effect of soy isoflavones containing soy protein on serum levels of CRP in adult population with chronic inflammatory diseases. Materials and methods We searched databases including PubMed, Cochrane Library, ISI Web of Science, Scopus, and clinicalTrials.gov up to March 2025. We used random effects model to calculate the heterogeneity and the overall effects. Results Twenty-seven articles were involved in the systematic review and twenty-two articles with thirty-four effect sizes were considered for meta-analysis. The overall estimates revealed that soy isoflavones containing soy protein significantly decreased serum levels of CRP in comparison with control group (weighted mean difference (WMD)= -0.49 mg/L; 95% confidence interval (CI): -0.74, -0.25; P = 0 < 0.001). Conclusion Although our results clearly showed soy isoflavones containing soy protein can have decreasing effect on inflammation in participants with chronic inflammatory disease, more large-scale and high quality interventional studies still need to be done to clarify our results.
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spelling doaj-art-23fdb8bd042240b295730a91b262d1fb2025-08-20T03:53:58ZengBMCJournal of Health, Population and Nutrition2072-13152025-05-0144111710.1186/s41043-025-00902-6Can soy isoflavones in combination with soy protein change serum levels of C-reactive protein among patients with chronic inflammatory diseases? A systematic review and meta-analysis on randomized controlled trialsAli Gholami0Bahareh Amirkalali1Mitra Hariri2Noncommunicable Diseases Research Center, Neyshabur University of Medical SciencesGastrointestinal & Liver Diseases Research Center, Iran University of Medical SciencesNoncommunicable Diseases Research Center, Neyshabur University of Medical SciencesAbstract Background C-reactive protein (CRP) is one of the most important markers for assessing inflammation status and its increased concentration in blood is associated with many chronic diseases in humans. The aim of this study was to reveal the effect of soy isoflavones containing soy protein on serum levels of CRP in adult population with chronic inflammatory diseases. Materials and methods We searched databases including PubMed, Cochrane Library, ISI Web of Science, Scopus, and clinicalTrials.gov up to March 2025. We used random effects model to calculate the heterogeneity and the overall effects. Results Twenty-seven articles were involved in the systematic review and twenty-two articles with thirty-four effect sizes were considered for meta-analysis. The overall estimates revealed that soy isoflavones containing soy protein significantly decreased serum levels of CRP in comparison with control group (weighted mean difference (WMD)= -0.49 mg/L; 95% confidence interval (CI): -0.74, -0.25; P = 0 < 0.001). Conclusion Although our results clearly showed soy isoflavones containing soy protein can have decreasing effect on inflammation in participants with chronic inflammatory disease, more large-scale and high quality interventional studies still need to be done to clarify our results.https://doi.org/10.1186/s41043-025-00902-6C-reactive proteinSoy isoflavonesSoy proteinSystematic reviewMeta-analysis
spellingShingle Ali Gholami
Bahareh Amirkalali
Mitra Hariri
Can soy isoflavones in combination with soy protein change serum levels of C-reactive protein among patients with chronic inflammatory diseases? A systematic review and meta-analysis on randomized controlled trials
Journal of Health, Population and Nutrition
C-reactive protein
Soy isoflavones
Soy protein
Systematic review
Meta-analysis
title Can soy isoflavones in combination with soy protein change serum levels of C-reactive protein among patients with chronic inflammatory diseases? A systematic review and meta-analysis on randomized controlled trials
title_full Can soy isoflavones in combination with soy protein change serum levels of C-reactive protein among patients with chronic inflammatory diseases? A systematic review and meta-analysis on randomized controlled trials
title_fullStr Can soy isoflavones in combination with soy protein change serum levels of C-reactive protein among patients with chronic inflammatory diseases? A systematic review and meta-analysis on randomized controlled trials
title_full_unstemmed Can soy isoflavones in combination with soy protein change serum levels of C-reactive protein among patients with chronic inflammatory diseases? A systematic review and meta-analysis on randomized controlled trials
title_short Can soy isoflavones in combination with soy protein change serum levels of C-reactive protein among patients with chronic inflammatory diseases? A systematic review and meta-analysis on randomized controlled trials
title_sort can soy isoflavones in combination with soy protein change serum levels of c reactive protein among patients with chronic inflammatory diseases a systematic review and meta analysis on randomized controlled trials
topic C-reactive protein
Soy isoflavones
Soy protein
Systematic review
Meta-analysis
url https://doi.org/10.1186/s41043-025-00902-6
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