| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Platycodon grandiflorum | Root | 13.0 | 18.0 | -0.3 | * |
| Cinnamomum aromaticum | Bark | 4.0 | 10.0 | -0.3 | * |
| Cinnamomum burmannii | Bark | -- | 10.0 | -0.3 | * |
| Polygonum multiflorum | Plant | -- | 24.5 | -0.3 | Leung, A. Y. and Foster, S. 1995. Encyclopedia of Common Natural Ingredients 2nd Ed. John Wiley & Sons, New York. 649 pp. |
| Brassica oleracea var. capitata l. | Leaf | 2.0 | 41.0 | -0.3 | * |
| Ribes nigrum | Fruit | 2.0 | 21.0 | -0.3 | * |
| Catalpa ovata | Fruit | -- | 21.0 | -0.3 | * |
| Chaenomeles lagenaria | Fruit | -- | 21.0 | -0.3 | * |
| Zizyphus jujuba | Fruit | -- | 21.0 | -0.3 | * |
| Brassica nigra | Leaf | 2.0 | 40.0 | -0.3 | USDA's Ag Handbook 8 and sequelae) |
| Arachis hypogaea | Seed | 31.0 | 35.0 | -0.3 | * |
| Rosmarinus officinalis | Leaf | 9.0 | 38.0 | -0.3 | USDA's Ag Handbook 8 and sequelae) |
| Artemisia capillaris | Plant | -- | 22.0 | -0.3 | * |
| Chamissoa altissima | Leaf | 4.0 | 36.0 | -0.3 | Tramil |
| Artemisia herba-alba | Plant | 10.0 | 21.0 | -0.3 | * |
| Lycium chinense | Fruit | -- | 20.0 | -0.3 | 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. |
| Psidium guajava | Fruit | 2.0 | 20.0 | -0.3 | USDA's Ag Handbook 8 and sequelae) |
| Pimenta dioica | Fruit | 11.0 | 20.0 | -0.3 | * |
| Elaeagnus umbellatus | Fruit | 3.0 | 20.0 | -0.3 | * |
| Dioscorea alata | Root | 2.0 | 17.0 | -0.3 | * |