| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Lycopersicon esculentum | Fruit | -- | -- | * | |
| Daucus carota | Root | -- | -- | * | |
| Prunus cerasus | Fruit | -- | -- | * | |
| Arctium lappa | Leaf | -- | -- | Wealth of India. | |
| Citrus sinensis | Fruit | -- | -- | Jim Duke's personal files. | |
| Ribes nigrum | Fruit | -- | -- | * |