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  • Title: Effects of probiotic/prebiotic/synbiotic supplementation on blood glucose profiles: a systematic review and meta-analysis of randomized controlled trials.
    Author: Wang Z, Li W, Lyu Z, Yang L, Wang S, Wang P, Song F, Chen K, Huang Y.
    Journal: Public Health; 2022 Sep; 210():149-159. PubMed ID: 35970017.
    Abstract:
    OBJECTIVES: Previous studies have evaluated the effects of probiotic/prebiotic/synbiotic supplementation on blood glucose profiles among diabetic patients. However, the results were inconsistent. STUDY DESIGN: Systematic review and meta-analysis. METHODS: A systematic searching from PubMed, ISI Web of Science, Embase, and Cochrane Central was conducted to identify high-quality clinical trials investigating the effect of probiotic/prebiotic/synbiotic supplementation on blood glucose profiles [including fasting blood glucose (FBG), hemoglobin A1c (HbA1c), and homeostasis model assessment of insulin resistance (HOMA-IR)] up to December 2020. Subgroup analyses by types or durations of probiotic/prebiotic/synbiotic supplementation were conducted to investigate the different effects among different populations. RESULTS: A total of 39 trials with 3517 participants were included in the final analyses. Among patients with type II diabetes (T2DM), the summarized standardized mean differences (SMDs) and 95% confidential intervals (95% CIs) of FBG, HbA1c, and HOMA-IR were -0.30 (95% CI: -0.65 to 0.05), -0.59 (95% CI: -0.88 to -0.30), and -0.68 (95% CI: -1.13 to -0.23), respectively. Among patients with gestational diabetes (GDM), the summary SMDs of FBG, HbA1c and HOMA-IR were -0.67 (95% CI: -1.23 to -0.11), -0.24 (95% CI: -0.57 to 0.08), and -1.06 (95% CI: -1.72 to -0.40), respectively. Similar improvements in blood glucose profiles were also found among persons with prediabetes or gestational woman with normal glucose, but not among patients with type I diabetes. Subgroup analyses showed similar results of probiotic supplementation for patients with T2DM and probiotic/synbiotic supplementation for patients with GDM. CONCLUSION: Probiotic/prebiotic/synbiotic supplementation might improve the blood glucose profiles among patients with T2DM/GDM, persons with prediabetes, or gestational woman with normal glucose. Trials with more sophisticated design are needed to validate the results in the future. SYSTEMATIC REVIEW REGISTRATION: PROSPERO CRD42020161975.
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