| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Citrus paradisi | Fruit | -- | -- | -1.4 | * |
| Citrus limon | Leaf | -- | -- | * | |
| Opuntia ficus-indica | Shoot | -- | -- | * | |
| Theobroma cacao | Plant | -- | -- | * | |
| Crataegus laevigata | Flower | -- | -- | * | |
| Prunus domestica | Fruit | -- | -- | List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979. | |
| Solanum melongena | Fruit | -- | -- | * | |
| Chelidonium majus | Plant | -- | -- | * | |
| Crataegus rhipidophylla | Flower | -- | -- | * | |
| Persea americana | Fruit | -- | -- | List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979. | |
| Lophophora williamsii | Plant | -- | -- | * | |
| Silybum marianum | Plant | -- | -- | * | |
| Cytisus scoparius | Plant | -- | -- | * | |
| Lycopersicon esculentum | Fruit | -- | -- | * | |
| Phoradendron serotinum | Plant | -- | -- | * | |
| Pisum sativum | Leaf | -- | -- | * | |
| Pisum sativum | Root | -- | -- | * | |
| Hordeum vulgare | Sprout Seedling | -- | 26.0 | * | |
| Crataegus laevigata | Plant | -- | -- | Leung, A. Y. and Foster, S. 1995. Encyclopedia of Common Natural Ingredients 2nd Ed. John Wiley & Sons, New York. 649 pp. | |
| Capsella bursa-pastoris | Plant | -- | -- | * |