| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Glycyrrhiza uralensis | Root | -- | -- | * | |
| Glycyrrhiza glabra | Root | 6000.0 | 22400.0 | * | |
| Glycyrrhiza glabra | Rhizome | -- | -- | * | |
| Terminalia ivorensis | Stem Bark | -- | -- | Iwu, M. M., Anyanwu, B. N. 1982. Anti-Inflammatory and Anti-Arthritic Properties of Terminalia ivorensis. Fitoterapia 53: 25-34. |