Evaluation of nitrate in cucumber and tomato vegetables: a systematic review and meta-analysis

Background and Objectives: The high level of nitrate in various vegetables is a highly important issue that poses a potential hazard to human health. This study evaluates the nitrate concentration in different vegetables.Methods: All published studies until September ۲۰۲۰ were examined in PubMed, Scopus, and Web of Science databases. The heterogeneity degree among the studies was appraised by I۲ heterogeneity statistic. The random-effects model was utilized to arrange the supplied concentration in subgroups including the continent and variety of vegetables.Results: The nitrate concentration in the studied vegetables indicated nitrate content in cucumber was higher than tomato. Depending on the continents, highest and lowest nitrate in cucumber vegetables were attributed to Australia, and Africa respectively, and also in regarding tomato vegetables were attributed to Asia, and Australia, respectively.Conclusion: Findings of this study showed that nitrate concentration varies in different countries. Results of this meta-analysis can be helpful in various risk manipulation models and beneficial to health policy design for farmers and industries for decreasing concentration of nitrate in different vegetables.

کلیدواژه ها:

Nitrate ، Vegetables ، Systematic review