| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Physalis ixocarpa | Fruit | 14.0 | 2974.0 | 11.3 | * |
| Echinacea spp | Root | 700.0 | 4800.0 | 6.5 | * |
| Senna occidentalis | Seed | -- | 1300.0 | 5.3 | * |
| Carum carvi | Seed | 123.0 | 1200.0 | 4.9 | * |
| Valerianella locusta | Plant | 3519.0 | 4143.0 | 4.1 | * |
| Amaranthus spinosus | Leaf | 22.0 | 1965.0 | 4.1 | * |
| Phaseolus lunatus | Seed | 22.0 | 1000.0 | 3.9 | * |
| Artemisia vulgaris | Plant | 1200.0 | 3900.0 | 3.9 | Chem. & Pharm. Bull. 38: 2205. |
| Aspalathus linearis | Shoot | -- | 3300.0 | 3.8 | * |
| Nyssa sylvatica | Leaf | 8.0 | 1820.0 | 3.7 | * |
| Phaseolus vulgaris | Fruit | 6.0 | 1050.0 | 3.6 | * |
| Asiasarum heterotropoides | Root | 450.0 | 2800.0 | 3.6 | * |
| Asiasarum sieboldii | Root | 450.0 | 2800.0 | 3.6 | * |
| Amomum xanthioides | Seed | -- | 910.0 | 3.5 | * |
| Symphoricarpos orbiculatus | Stem | 19.0 | 4400.0 | 3.5 | * |
| Boehmeria nivea | Plant | 1500.0 | 3500.0 | 3.4 | * |
| Anemarrhena asphodeloides | Rhizome | 90.0 | 1400.0 | 3.1 | * |
| Prunella vulgaris | Flower | -- | 640.0 | 3.1 | Chen, H.C. and Lin, S.M. 1988. Determination of Mineral Elements in Certain Crude Drugs (Part 1), Kaohsiung J. Med. Sci., 4: 259-272. |
| Viburnum opulus | Bark | -- | 880.0 | 3.1 | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. |
| Amaranthus sp. | Leaf | 23.0 | 1527.0 | 2.9 | * |