| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Punica granatum | Fruit | -- | -- | * | |
| Fagopyrum esculentum | Seed | -- | -- | * | |
| Panax ginseng | Root | -- | -- | * | |
| Allium ampeloprasum | Plant | -- | -- | * | |
| Urtica dioica | Leaf | -- | -- | Jim Duke's personal files. | |
| Spinacia oleracea | Leaf | -- | -- | * | |
| Zea mays | Pollen Or Spore | -- | -- | * |