| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Medicago sativa | Fruit | -- | 140.0 | * | |
| Ocimum basilicum | Leaf | -- | -- | * | |
| Anethum graveolens | Seed | -- | -- | * | |
| Medicago sativa | Plant | -- | -- | * | |
| Scopolia carniolica | Leaf | -- | -- | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses | |
| Cichorium intybus | Leaf | -- | -- | * | |
| Cichorium intybus | Plant | -- | -- | * | |
| Lawsonia inermis | Leaf | -- | -- | * | |
| Citrus paradisi | Fruit | -- | -- | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses | |
| Prunella vulgaris | Shoot | -- | -- | * | |
| Althaea officinalis | Shoot | -- | -- | * | |
| Althaea officinalis | Root | -- | -- | * | |
| Artemisia dracunculus | Shoot | -- | -- | * | |
| Armoracia rusticana | Plant | -- | -- | Newall, C. A., Anderson, L. A. and Phillipson, J. D. 1996. Herbal Medicine - A Guide for Health-care Professionals. The Pharmaceutical Press, London. 296pp. | |
| Papaver somniferum | Pericarp | -- | -- | * | |
| Phaseolus vulgaris | Shoot | -- | -- | * | |
| Urtica dioica | Plant | -- | -- | Jim Duke's personal files. | |
| Nicotiana tabacum | Leaf | -- | -- | ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes. | |
| Hordeum vulgare | Protoplast | -- | -- | * | |
| Artemisia vulgaris | Plant | -- | -- | Bisset, N.G., ed. 1994. Herbal Drugs and Phytopharmaceuticals. CRC Press. Boca Raton, FL. 566 pp. |