Authors: Bahadoran, Zahra
Jeddi, Sajad
Gheibi, Sevda
Mirmiran, Parvin
Kashfi, Khosrow
Ghasemi, Asghar
Title: Inorganic nitrate, a natural anti-obesity agent
Other Titles: a systematic review and meta-analysis of animal studies
Language (ISO): en
Abstract: Evidence for potential effects of inorganic nitrate (NO3) on body weight is limited to inconsistent findings of animal experiments. In this systematic review and meta-analysis, we aimed to quantify the overall effect of inorganic NO3, administered via drinking water, on body weight gain in rats. We searched PubMed, Scopus, and Embase databases, and the reference lists of published papers. Experiments on male rats, reported data on body weight in NO3-treated animals and controls, were included for quality assessment, meta-analyses, subgroup analyses, and meta-regressions. Of 173 initially obtained studies, 11 were eligible to be included in the analyses, which covered the years 2004 to 2019 and included a total of 43 intervention (n=395) and 43 control (n=395) arms. Overall, the final body weights were significantly lower in the NO3-supplemented groups compared to controls (WMD= –16.8 g, 95 % CI= –27.38, –6.24; P=0.002). Doses of NO3 higher than the median (> 72.94 mg L-1 d-1) and longer NO3 exposure (> 8 weeks) resulted in greater mean differences (WMD= –31.92 g, 95 % CI= –52.90, –10.94 and WMD= –23.16 g, 95 % CI= –35.64, –10.68 g). After exclusion of experiments using high doses of NO3 (> 400 mg L-1 d-1), the overall mean differences in body weights between the groups decreased by approximately 37 % but remained statistically significant (WMD= –10.11 g, 95 % CI= –19.04, –1.19, P=0.026). Mean changes in body weight were affected by age, baseline values in body weight, and the duration of the studies. These preliminary experimental findings strongly support the hypothesis that NO3 can be considered as a natural anti-obesity agent.
Subject Headings: Nitrate
Body weight
Systematic review
Publishers Link:
Issue Date: 2020-07-06
Rights link:
Provenance: IfADo - Leibniz Research Centre for Working Environment and Human Factors, Dortmund
Citation: Bahadoran, Z., Jeddi, S., Gheibi, S., Mirmiran, P., Kashfi, K., & Ghasemi, A. (2020). Inorganic nitrate, a natural anti-obesity agent: A systematic review and meta-analysis of animal studies. EXCLI Journal, 19, 972-983.
Appears in Collections:Review Articles 2020

Files in This Item:
File Description SizeFormat 
excli2020-2515.pdfDNB179.34 kBAdobe PDFView/Open

This item is protected by original copyright

This item is licensed under a Creative Commons License Creative Commons