| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Cimicifuga dahurica | Rhizome | -- | 74.0 | -0.3 | * |
| Actaea dahurica | Rhizome | -- | 74.0 | -0.3 | Suziki, A., Morimoto, I., and Okitzu, T., Elution of Metals from Crude Drugs, Shoykugaku Zasshi 36(3):190-195. |
| Plantago asiatica | Plant | -- | 74.0 | -0.2 | * |
| Acanthopanax gracilistylis | Root Bark | -- | 74.0 | -0.1 | * |
| Juglans cinerea | Seed | 31.0 | 72.0 | 0.2 | * |
| Berberis vulgaris | Fruit | -- | 72.0 | 0.1 | Jim Duke's personal files. |
| Cichorium endivia | Leaf | 4.0 | 72.0 | -0.3 | * |
| Erythroxylum coca | Leaf | 26.0 | 71.0 | -0.3 | * |
| Linum usitatissimum | Seed | 50.0 | 70.0 | 0.2 | * |
| Glehnia littoralis | Root | -- | 70.0 | 0.3 | * |
| Lonicera japonica | Flower | -- | 70.0 | -0.1 | * |
| Pimenta dioica | Bud | 29.0 | 70.0 | USDA's Ag Handbook 8 and sequelae) | |
| Eupatorium odoratum | Leaf | -- | 70.0 | -0.3 | Tramil |
| Peucedanum decursivum | Plant | 43.0 | 69.0 | -0.2 | * |
| Papaver somniferum | Seed | 29.0 | 68.0 | 0.2 | * |
| Schizonepeta tenuifolia | Plant | -- | 68.0 | -0.2 | * |
| Symphytum officinale | Root | -- | 67.0 | 0.3 | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. |
| Areca catechu | Seed | -- | 67.0 | 0.2 | * |
| Achyranthes bidentata | Root | 40.0 | 66.0 | 0.2 | * |
| Coriandrum sativum | Leaf | -- | 64.0 | -0.4 | USDA's Ag Handbook 8 and sequelae) |