| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Agrimonia eupatoria | Leaf | 100.0 | 300.0 | Newall, C. A., Anderson, L. A. and Phillipson, J. D. 1996. Herbal Medicine - A Guide for Health-care Professionals. The Pharmaceutical Press, London. 296pp. | |
| Linum usitatissimum | Seed | -- | 38.0 | 1.0 | * |
| Theobroma cacao | Seed | -- | 21.0 | -1.0 | ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes. |
| Pisum sativum | Sprout Seedling | -- | 0.7 | * | |
| Panax ginseng | Root | -- | -- | * | |
| Petroselinum crispum | Plant | -- | -- | Stitt, Paul. Why George should eat broccoli. | |
| Anemarrhena asphodeloides | Rhizome | -- | -- | * | |
| Angelica sinensis | Root | -- | -- | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. | |
| Trigonella foenum-graecum | Seed | -- | -- | * |