Does soy protein supplementation affect body composition in healthy exerciser adults? A systematic review and meta-analysis of clinical trials

Ebrahim Falahi, Esmaeil Yousefi Rad, Omid Asbaghi, Mohammad Zeinali Khosroshahi, Cain Clark, Sadegh Jafarnejad

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Abstract

Background objectives
The effects of soy protein supplementation on anthropometric parameters and body composition indices of healthy adults is equivocal. The aims of this systematic review and meta-analysis were to assess the effects of soy protein supplementation on weight and body composition of healthy adults in clinical trial studies.
Methods
A systematic search of literature was carried out on clinical trial studies in PubMed, Scopus, Cochrane's library and ISI Web of Science Direct up until November 2017. From 492 studies initially retrieved, only 8 articles with 6, 5 and 4 arms included in the meta-analysis of the effects of soy protein supplementation on body weight, Fat free mass and Fat mass, respectively, with 120 participants in the intervention group and 119 participants in the control group.
Results
Results of the fixed effect model meta-analysis showed that soy protein supplementation had no significant effects on body weight (0.94 kg, 95% CI: −2.41, 4.30 kg; P = 0.58), fat-free mass (0.6 kg, 95% CI: −0.21, 1.41; P = 0.14) or fat mass (0.43 kg, 95% CI: −2.18, 3.03; P = 0.74) in healthy exercising adults.
Conclusions
Results of this meta-analysis study does not confirm any significant beneficial effects of soy protein supplementation on weight and body composition in healthy adults.
Original languageEnglish
Article number100083
JournalObesity Medicine
Volume14
Early online date18 Feb 2019
DOIs
Publication statusPublished - 1 Jun 2019

Bibliographical note

NOTICE: this is the author’s version of a work that was accepted for publication in Obesity Medicine. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Obesity Medicine, 14, (2019) DOI: 10.1016/j.obmed.2019.02.002

© 2019, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

Keywords

  • Fat mass
  • Fat-free mass
  • Meta-analysis
  • Soy protein
  • Weight

ASJC Scopus subject areas

  • Internal Medicine
  • Endocrinology, Diabetes and Metabolism
  • Public Health, Environmental and Occupational Health

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