| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Achyranthes bidentata | Root | 1440.0 | 5730.0 | 1.7 | * |
| Erythroxylum coca | Leaf | 2130.0 | 5700.0 | 0.6 | * |
| Salix alba | Bark | 941.0 | 5600.0 | 2.6 | * |
| Lablab purpureus | Seed | 400.0 | 5505.0 | 1.0 | * |
| Mentha pulegium | Plant | -- | 5500.0 | 0.4 | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. |
| Harpagophytum procumbens | Root | 1034.0 | 5440.0 | 1.5 | * |
| Diospyros virginiana | Stem | 660.0 | 5400.0 | 0.3 | * |
| Prunus serotina | Stem | 28.0 | 5400.0 | 0.3 | * |
| Arctium lappa | Root | 1262.0 | 5370.0 | 1.5 | * |
| Plantago asiatica | Plant | -- | 5320.0 | 0.4 | * |
| Quercus alba | Stem | 100.0 | 5320.0 | 0.2 | * |
| Oenothera biennis | Seed | 4300.0 | 5300.0 | 0.9 | * |
| Stellaria media | Plant | 439.0 | 5290.0 | 0.4 | * |
| Hyoscyamus niger | Seed | -- | 5250.0 | 0.9 | * |
| Corchorus olitorius | Leaf | 640.0 | 5200.0 | 0.4 | * |
| Althaea officinalis | Root | 559.0 | 5180.0 | 1.4 | * |
| Helianthus annuus | Seed | 3540.0 | 5176.0 | 0.9 | * |
| Asimina triloba | Fruit | 1090.0 | 5128.0 | 1.4 | * |
| Glycyrrhiza uralensis | Root | 3690.0 | 5070.0 | 1.3 | * |
| Foeniculum vulgare | Fruit | 1730.0 | 5012.0 | 1.3 | * |