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The Effects of Dietary Nitrate on Blood Pressure and Vascular Health: An Umbrella Review and Updated Meta-Analysis and Meta-Regression Publisher



Norouzzadeh M1 ; Hasan Rashedi M1 ; Payandeh N2 ; Mirdar Harijani A1 ; Shahinfar H1
Authors
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Authors Affiliations
  1. 1. Department of Nutrition, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
  2. 2. Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences (TUMS), Tehran, Iran

Source: Journal of Functional Foods Published:2024


Abstract

Objective: We aimed to comprehensively assess the impact of dietary nitrate supplementation on blood pressure (BP) and vascular health. Method: We systematically searched PubMed, Scopus, and Web of Science until January 2024 to find eligible meta-analyses. For each meta-analysis, the mean difference and its 95% CI were recalculated using a random-effects model. Results: We analyzed 113 studies involving 2013 participants and found that dietary nitrate supplementation can reduce both resting systolic and diastolic BP. Additionally, dietary nitrate can decrease pulse wave velocity and augmentation index while increasing flow-mediated dilation. Also, according to influence analysis results, dietary nitrate supplementation can reduce ambulatory systolic BP, ambulatory diastolic BP, and mean arterial pressure. The BP-lowering effect became more pronounced with increased study duration and nitrate dosage. Conclusion: Dietary nitrate supplementation may reduce BP and enhance vascular health. However, further research is needed on the dose–response relationship, long-term safety, and compliance with dietary nitrate. © 2024 The Author(s)
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