| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Paeonia lactiflora | Root | 15.0 | 24.0 | -0.0 | * |
| Pulsatilla chinensis | Root | -- | 24.0 | -0.0 | * |
| Syzygium aromaticum | Fruit | 10.0 | 30.0 | -0.0 | * |
| Agathosma betulina | Leaf | -- | 84.0 | -0.0 | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. |
| Barosma betulina | Leaf | -- | 84.0 | -0.0 | * |
| Perilla frutescens | Plant | -- | 50.0 | -0.0 | Suziki, A., Morimoto, I., and Okitzu, T., Elution of Metals from Crude Drugs, Shoykugaku Zasshi 36(3):190-195. |
| Origanum vulgare | Plant | 39.0 | 49.0 | -0.0 | USDA's Ag Handbook 8 and sequelae) |
| Fallopia japonica | Plant | 42.0 | 49.0 | -0.0 | Chem. & Pharm. Bull. 38: 2205. |
| Brassica pekinensis | Leaf | 66.5 | 80.0 | -0.0 | * |
| Brassica rapa | Root | 2.0 | 23.0 | -0.1 | * |
| Mentha spicata | Leaf | 11.0 | 75.0 | -0.1 | USDA's Ag Handbook 8 and sequelae) |
| Rubus chingii | Fruit | -- | 28.0 | -0.1 | * |
| Elettaria cardamomum | Fruit | 23.0 | 28.0 | -0.1 | * |
| Sechium edule | Leaf | 0.5 | 73.0 | -0.1 | * |
| Sassafras albidum | Stem | 4.0 | 111.0 | -0.1 | * |
| Chondrus crispus | Plant | -- | 44.0 | -0.1 | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. |
| Lens culinaris | Seed | 37.0 | 42.0 | -0.1 | USDA's Ag Handbook 8 and sequelae) |
| Origanum majorana | Plant | 32.0 | 43.0 | -0.1 | * |
| Boehmeria nivea | Plant | 32.0 | 43.0 | -0.1 | * |
| Vitis vinifera | Fruit | 0.4 | 27.0 | -0.1 | * |