| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Viburnum opulus | Branches | -- | -- | * | |
| Sophora japonica | Plant | -- | -- | * | |
| Vitis vinifera | Leaf | -- | -- | * | |
| Equisetum arvense | Shoot | -- | -- | Jim Duke's personal files. | |
| Juniperus communis | Leaf | -- | -- | * | |
| Vitis vinifera | Root | -- | -- | * | |
| Juniperus communis | Fruit | -- | -- | * | |
| Citrullus lanatus | Seed | -- | -- | * | |
| Gentiana lutea | Root | -- | -- | * | |
| Cnicus benedictus | Plant | -- | -- | Jim Duke's personal files. | |
| Arctium lappa | Root | -- | 2500.0 | 0.2 | * |
| Hypericum perforatum | Plant | -- | 1000.0 | -0.9 | * |
| Punica granatum | Plant | -- | -- | * | |
| Allium schoenoprasum | Leaf | -- | 0.5 | -0.7 | * |
| Dipsacus fullonum | Plant | -- | -- | List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979. | |
| Rosmarinus officinalis | Plant | -- | -- | Leung, A.Y., Encyclopedia of Common Natural Ingredients Used in Food, Drugs, and Cosmetics, John Wiley & Sons, New York, 1980. | |
| Cimicifuga dahurica | Rhizome | -- | -- | * | |
| Senna obtusifolia | Seed | -- | -- | * | |
| Dodonaea viscosa | Plant | -- | -- | * | |
| Aspalathus linearis | Shoot | -- | 0.66 | -0.7 | * |