The Risk Assessment of Pb and Cd Through Consuming Spices

Spices are likely to contain toxic heavy metals. The objective of this study was to assess the non-carcinogenic risk of consuming curry powder, turmeric and cardamom, marketed both in bulk and in packaged form, in Hamedan, Iran, as regards lead and cadmium in 2015.
This descriptive study, conducted in Hamedan, Iran, included nine samples of packaged and nine samples of bulked spices, the heavy metal contents of which were measured in triplicates, after acid digestion, by atomic absorption. The data were analyzed by SPSS, the statistical tests being one-way ANOVA, Shapiro-Wilks test, oOne-Sample T-Test, Pearson's correlation coefficient and the independent T-test.
The maximum mean concentrations of lead and cadmium (mg/kg) were 5.48±0.95 and 0.13±0.20, respectively. The mean concentration of lead in turmeric samples was higher than the respective WHO standard. On the other hand, the health index (HI) of lead in the turmeric sample (mean =3/25×10-2, 1/5×10-1) and that of cadmium (222×10-3, 1/04×10-2) were less than one, that is, below the risk threshold for children and adults, respectively.
The findings based on health index show that consumption of spices does not pose any risk for the consumers. However, considering that the mean concentration of lead in the turmeric samples exceed the respective standard, as well as the non-biodegradability and bioaccumulation of heavy metals, if consumption of spices is not controlled, health problems in the long term are not unlikely to occur in the consumers. Therefore, regular periodic monitoring of chemical pollutants content of spices, especially heavy metals, is recommended for protection of consumers’ health.