Effect of selenium supplementation on antioxidant markers: a systematic review and meta-analysis of randomized controlled trials

Abstract

Aim

The aim of this study is the systematic review and meta-analysis of controlled trial studies to assess the antioxidant effects of selenium (Se) supplementation.

Methods

The systematic review and meta-analysis were performed according to the previously published protocol. The PubMed, Web of Sciences, and Scopus databases were meticulously searched for relevant data, without time or language restriction, up to June 1, 2017. All clinical trials which assessed the effect of Se supplementation on antioxidant markers, including oxidative stress index (OSI), antioxidant potency composite (APC) index, plasma malonaldehyde (MDA), total antioxidant capacity (TAC), antioxidant enzymes (superoxide dismutase (SOD), glutathione peroxidase (GPX), catalase (CAT)), and total antioxidant plasma (TAP), were included. The effect of Se supplementation on antioxidant markers was assessed using standardized mean difference (SMD) and 95% confidence interval (CI). The random-effect meta-analysis method was used to estimate the pooled SMD.

Results

In total, 13 studies which assessed the effect of Se supplementation on antioxidant markers were included. The random-effect meta-analysis method showed that Se supplementation significantly increased GPX (SMD = 0.54; 95% CI = 0.21–0.87) and TAC (SMD = 0.39, 95% CI = 0.13, 0.66) levels and decreased MDA levels (SMD = − 0.54, 95% CI = − 0.78, − 0.30). The effect of Se supplementation on other antioxidant markers was not statistically significant (P > 0.05).

Conclusion

The findings showed that Se supplementation might reduce oxidative stress by increasing TAC and GPX levels and decreasing serum MDA, both of which are crucial factors for reduction of oxidative stress.

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Change history

  • 01 July 2020

    The original version of this article, published on 10 December 2019 contained a mistake.

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Acknowledgments

The authors would like to express their appreciation to all participants and scientific and executive partners who took part in this study.

Funding

The research reported in this publication was supported by the Elite Researcher Grant Committee under award number [963478] from the National Institutes for Medical Research Development (NIMAD), Tehran, Iran.

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MQ and RH participated in the study design and drafted the manuscript. SD and MQ participated in the study design and statistical analysis and drafted the manuscript. MH and HA contributed to the protocol development and drafted the manuscript. MK, AM, and MZ contributed to the data acquisition. All authors read and approved the final manuscript.

Corresponding authors

Correspondence to Mostafa Qorbani or Ramin Heshmat.

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The authors declare that they have no competing interests.

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Hasani, M., Djalalinia, S., Khazdooz, M. et al. Effect of selenium supplementation on antioxidant markers: a systematic review and meta-analysis of randomized controlled trials. Hormones 18, 451–462 (2019). https://doi.org/10.1007/s42000-019-00143-3

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Keywords

  • Selenium
  • Supplementation
  • Antioxidant