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Soy isoflavone supplementation could reduce body weight and improve glucose metabolism in non-Asian postmenopausal women--a meta-analysis.

Abstract

OBJECTIVE

The objective of this study was to conduct a systematic review and a meta-analysis to confirm the effects of soy isoflavone supplementation on body weight, fasting glucose, and insulin level in non-Asian postmenopausal women.

METHODS

We searched the PubMed, EMBASE, and Cochrane databases up to October 2010 for randomized controlled trials regarding the effects of isoflavone supplementation on body weight, fasting glucose, and insulin level. Pooled estimates and 95% confidence intervals (CIs) were calculated by the fixed-and-random-effects model.

RESULTS

Nine studies with 528 participants for body weight, 11 studies with 1182 participants for fasting glucose, and 11 studies with 1142 participants for fasting insulin were included, respectively. Significant reductions were found in body weight [weighted mean difference (WMD), -0.515; 95%CI: -0.895 to -0.134; P = 0.008), glucose level (WMD, -0.189; 95%CI: -0.344 to -0.033), and fasting insulin level (WMD, -0.940; 95%CI: -1.721 to -0.159) with soy isoflavone supplementation compared with placebo control group in non-Asian postmenopausal women after adjusted by unpublished studies. Furthermore, isoflavone supplementation in shorter duration (<6 mo) could significantly reduce body weight (WMD, -0.506; 95%CI: -0.888 to -0.124; P = 0.009) and longer duration (≥ 6 mo) could significantly reduce blood glucose in postmenopausal women (WMD, -0.270; 95%CI: -0.430 to -0.110; P = 0.001). Meanwhile, more reduction in body weight was observed in the lower dose subgroup (dose < 100 mg). Moreover, it is more effective to reduce body weight and fasting insulin level with soy isoflavone supplementation in normal weight (body mass index < 30) than obese (body mass index ≥ 30) women.

CONCLUSIONS

This meta-analysis showed soy isoflavone supplementation could be beneficial for body weight reduction, glucose, and insulin control in plasma. Large and well-designed studies are recommended to confirm this conclusion.

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  • Authors+Show Affiliations

    ,

    Department of Environmental Hygiene, Public Health College, Harbin Medical University, Harbin, 150086, Heilongjiang Province, China.

    , , , , ,

    Source

    MeSH

    Aged
    Blood Glucose
    Body Weight
    Dietary Supplements
    Fasting
    Female
    Humans
    Insulin
    Isoflavones
    Middle Aged
    Postmenopause
    Randomized Controlled Trials as Topic
    Soybeans

    Pub Type(s)

    Journal Article
    Meta-Analysis
    Research Support, Non-U.S. Gov't
    Review
    Systematic Review

    Language

    eng

    PubMed ID

    22858192

    Citation

    Zhang, Yun-Bo, et al. "Soy Isoflavone Supplementation Could Reduce Body Weight and Improve Glucose Metabolism in non-Asian Postmenopausal Women--a Meta-analysis." Nutrition (Burbank, Los Angeles County, Calif.), vol. 29, no. 1, 2013, pp. 8-14.
    Zhang YB, Chen WH, Guo JJ, et al. Soy isoflavone supplementation could reduce body weight and improve glucose metabolism in non-Asian postmenopausal women--a meta-analysis. Nutrition. 2013;29(1):8-14.
    Zhang, Y. B., Chen, W. H., Guo, J. J., Fu, Z. H., Yi, C., Zhang, M., & Na, X. L. (2013). Soy isoflavone supplementation could reduce body weight and improve glucose metabolism in non-Asian postmenopausal women--a meta-analysis. Nutrition (Burbank, Los Angeles County, Calif.), 29(1), pp. 8-14. doi:10.1016/j.nut.2012.03.019.
    Zhang YB, et al. Soy Isoflavone Supplementation Could Reduce Body Weight and Improve Glucose Metabolism in non-Asian Postmenopausal Women--a Meta-analysis. Nutrition. 2013;29(1):8-14. PubMed PMID: 22858192.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - Soy isoflavone supplementation could reduce body weight and improve glucose metabolism in non-Asian postmenopausal women--a meta-analysis. AU - Zhang,Yun-Bo, AU - Chen,Wen-Hua, AU - Guo,Jing-Jing, AU - Fu,Zheng-Hai, AU - Yi,Cheng, AU - Zhang,Ming, AU - Na,Xiao-Lin, Y1 - 2012/08/02/ PY - 2011/06/22/received PY - 2011/08/30/revised PY - 2012/03/30/accepted PY - 2012/8/4/entrez PY - 2012/8/4/pubmed PY - 2013/5/15/medline SP - 8 EP - 14 JF - Nutrition (Burbank, Los Angeles County, Calif.) JO - Nutrition VL - 29 IS - 1 N2 - OBJECTIVE: The objective of this study was to conduct a systematic review and a meta-analysis to confirm the effects of soy isoflavone supplementation on body weight, fasting glucose, and insulin level in non-Asian postmenopausal women. METHODS: We searched the PubMed, EMBASE, and Cochrane databases up to October 2010 for randomized controlled trials regarding the effects of isoflavone supplementation on body weight, fasting glucose, and insulin level. Pooled estimates and 95% confidence intervals (CIs) were calculated by the fixed-and-random-effects model. RESULTS: Nine studies with 528 participants for body weight, 11 studies with 1182 participants for fasting glucose, and 11 studies with 1142 participants for fasting insulin were included, respectively. Significant reductions were found in body weight [weighted mean difference (WMD), -0.515; 95%CI: -0.895 to -0.134; P = 0.008), glucose level (WMD, -0.189; 95%CI: -0.344 to -0.033), and fasting insulin level (WMD, -0.940; 95%CI: -1.721 to -0.159) with soy isoflavone supplementation compared with placebo control group in non-Asian postmenopausal women after adjusted by unpublished studies. Furthermore, isoflavone supplementation in shorter duration (<6 mo) could significantly reduce body weight (WMD, -0.506; 95%CI: -0.888 to -0.124; P = 0.009) and longer duration (≥ 6 mo) could significantly reduce blood glucose in postmenopausal women (WMD, -0.270; 95%CI: -0.430 to -0.110; P = 0.001). Meanwhile, more reduction in body weight was observed in the lower dose subgroup (dose < 100 mg). Moreover, it is more effective to reduce body weight and fasting insulin level with soy isoflavone supplementation in normal weight (body mass index < 30) than obese (body mass index ≥ 30) women. CONCLUSIONS: This meta-analysis showed soy isoflavone supplementation could be beneficial for body weight reduction, glucose, and insulin control in plasma. Large and well-designed studies are recommended to confirm this conclusion. SN - 1873-1244 UR - https://www.unboundmedicine.com/medline/citation/22858192/Soy_isoflavone_supplementation_could_reduce_body_weight_and_improve_glucose_metabolism_in_non_Asian_postmenopausal_women__a_meta_analysis_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0899-9007(12)00143-8 DB - PRIME DP - Unbound Medicine ER -