| Substance | Effect | TDI | Reference |
| Pb | Threshold effect | 6.3 × 10−4 (mg/kg/j) | [22] |
| Non-threshold effect | 8.5 × 10−3 (mg/kg/j)−1 | [23] | |
| Cd | Threshold effect | 3.6 × 10−4 (mg/kg/j) | [24] |
| Hg | Threshold effect | 1∙10−4 (mg/kg/j) | [25] |
| Cu | Threshold effect | 1.4 × 10−1 (mg/kg/j) | [25] |
| Zn | Threshold effect | 3∙10−1 (mg/kg/j) | [26] |