| Region/ Country | Ranges Sc (mg/kg) | Mean Sc (mg/kg) | Ranges Sm (mg/kg) | Mean Sm (mg/kg) | References |
| USA | 2.8 - 17 | 9.9 | 5.2 - 6.6 | 5.9 | [37] |
| Germany | 0.8 - 15 | 6.1 | 0.5 - 8.7 | 3.8 | [38] |
| Australia | - | - | 0.4 - 4.6 | 2.8 | [39] |
| China | 11 - 13 | 12 | 1.2 - 7.8 | 5.2 | [38] |
| Japan | 0.4 - 56 | 17 | 0.2 - 30 | 3.8 | |
| Brazil | 6.6 - 30 | 18 | 0.4 - 6.7 | 3.5 | |
| Albania | 10 - 15 | 13 | 3.6 - 5.3 | 4.5 | [40] |
| Austria | 1.3 - 21 | 12 | 0.7 - 10 | 5.2 | |
| France | 0.3 - 29 | 9.3 | 0.4 - 11 | 5.1 | |
| Ranges Fe (mg/kg) | Mean Fe (mg/kg) | Ranges Zn (mg/kg) | Mean Zn (mg/kg) | ||
| India (Punjab) | 2800.0 - 5700.0 | 73.0 - 320.0 | - | [30] | |
| USA | - | - | <3 - 264 | 43 | [34] |
| Sweden | - | - | 6 - 152 | 65 | [33] |
| Japan | - | - | 2.5 - 330 | 89 | [35] |
| Europe | - | - | 7 - 89 | - | [31] [32] |