Dietary Total Antioxidant Capacity and Risk of Prediabetes and Diabetes Mellitus: a Systematic Review and Dose-response Meta-analysis of 170,919 Participants

Overview

Journal Front Nutr

Specialty Nutritional Sciences

Date 2025 Mar 12

PMID 40070482

Authors

Ruomeng Li

Long Shu

Qin Zhu

Dan Lu

Affiliations

Soon will be listed here.

Abstract

Background: Observational studies have assessed the association between total antioxidant capacity of the diet and risk of diabetes mellitus. However, results from these studies were not entirely consistent. In the current systematic review and dose-response meta-analysis, we aimed to determine the association between dietary total antioxidant capacity (TAC) and the risk of prediabetes and diabetes mellitus.

Methods: A systematic literature search of authentic electronic resources including PubMed/Medline, Embase, Scopus, ISI Web of Science and China National Knowledge Infrastructure (CNKI) was carried out to find the relevant articles published up to November 2024. Random-effects or fixed-effects models were used to aggregate the relative risks (RRs) and their 95% confidence intervals (CIs) where appropriate. Heterogeneity across the studies were determined using the Cochran's test and -square ( ) statistics.

Results: A total of 10 observational studies (five cohort, three case-control and two cross-sectional studies) were included in our meta-analysis. The pooled results indicated that higher dietary TAC was significantly associated with lower risk of prediabetes (RR = 0.58; 95% CI: 0.34-0.97;  = 0.039) and diabetes mellitus (RR = 0.71; 95% CI: 0.58-0.87,  = 0.001). In addition, dose-response analysis showed a linear trend association between dietary TAC and risk of diabetes mellitus (RR = 0.928; 95% CI: 0.842-1.023, = 0.131, = 0.078). Subgroup analyses showed the significant inverse association between dietary TAC and diabetes mellitus in mean age <50 and sample size <5,000 (RR = 0.26, 95% CI: 0.16-0.41,  < 0.001), and there was no evidence of heterogeneity ( = 0.939; = 0.0%). Meanwhile, there was also an inverse association between dietary TAC and diabetes mellitus in Western countries (RR = 0.79; 95% CI: 0.68-0.92,  = 0.003), with less evidence of heterogeneity ( = 0.226; = 36.7%).

Conclusion: Overall, higher dietary TAC was inversely associated with the risk of prediabetes and diabetes mellitus. Further well-designed prospective studies or randomized controlled trials are needed to validate the present findings.

Systematic Review Register: (PROSPERO), CRD42024611235.

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