Global Advanced Research Journal of Agricultural Science (GARJAS) ISSN: 2315-5094
May 2020 Vol. 9(5): pp. 110-120
Copyright © 2020 Global Advanced Research Journals


Full Length Research Paper

The concentration of toxic metals in teas: A global systematic review, meta-analysis and probabilistic health risk assessment

Fereshteh Mehri1, Maryam Adabi2, Elaheh Talebi Ghane3, Salman Khazaei4*


1Nutrition Health Research Center, Hamadan University of Medical Sciences.

2Brucellosis Research Center, Hamadan University of Medical Sciences, Hamadan, Iran.

3 PhD in Biostatistics, Hamadan University of Medical Sciences Hamadan, Iran.

4Research Center for Health Sciences, Hamadan University of medical Sciences, Hamadan, Iran.

*Corresponding Author's Email:

Accepted 13 May, 2020



Background: The tea next to water is the heavily consumed beverage among the world’s population. In current investigation was evaluated the concentration of different metals in teas consumptions through meta-analysis. Methods: The related studies regarding to the concentration of toxic metals in teas were collected from international major databases. A random effect model was used for meta-analysis concentration of Cd, Pb and As in tea among defined subgroups. Results: The mean concentration of toxic metals in the teas was Pb (0.55 mg/kg) > Cd (0.13 mg/kg) > As (0.07 mg/kg), respectively. The highest concentration of metals in green and black tea was related to Pb and As, respectively. Conclusion: Due to the high concentration of metals in different tea samples in many of countries and the health risk for consumersitis need to performing of control plans by governments and farmers for decrease concentration of toxic metals in tea.

Keywords:  Toxic metals, Tea, Concentration, Systematic review, Meta-analysis.







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