Where C is the concentration of the heavy metals in contaminated rice; Cons stands for the daily average consumption of rice in the study region; and Bw represents the body weight. Based on the dietary nutrition intake level survey by Zhong et al., and Yu-sheng et al. [11,16,29-34], rice was the staple food for daily consumption, and the adult residents in the region had an average daily intake of 130 g rice per day. Their body weight was set to 60 kg in this study [6].