| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Rehmannia glutinosa | Root | 4000.0 | 31000.0 | 1.4 | * |
| Phoenix dactylifera | Fruit | 2660.0 | 3370.0 | 1.4 | * |
| Hypericum perforatum | Plant | -- | 700.0 | * | |
| Lycopersicon esculentum | Fruit | 220.0 | 480.0 | -0.6 | * |
| Urtica dioica | Root | -- | 250.0 | -0.7 | Blaschek, W., Hansel, R., Keller, K., Reichling, J., Rimpler, H., and Schneider, G. eds. 1998. Hager's Handbuch der Pharmazeutischen Praxis, Auflage Band 2 (A-K), 909 pp., (L-Z), 858 pp. Springer-Verlag, Berlin. |
| Pisum sativum | Shoot | -- | 153.0 | * | |
| Ananas comosus | Fruit | -- | 124.0 | -0.8 | * |
| Arctium lappa | Root | -- | 25.0 | -0.7 | Wealth of India. |
| Valeriana officinalis | Root | -- | -- | * | |
| Hyoscyamus niger | Leaf | -- | -- | * | |
| Annona muricata | Plant | -- | -- | * | |
| Nicotiana tabacum | Leaf | -- | -- | ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes. | |
| Astragalus membranaceus | Root | -- | -- | Chemical Constituents of Oriental Herbs (3 diff. books) | |
| Momordica charantia | Fruit | -- | -- | * | |
| Lycium barbarum | Fruit | -- | -- | Leung, A. Y. and Foster, S. 1995. Encyclopedia of Common Natural Ingredients 2nd Ed. John Wiley & Sons, New York. 649 pp. | |
| Cucurbita pepo | Seed | -- | -- | * | |
| Achyranthes bidentata | Root | -- | -- | * | |
| Arachis hypogaea | Plant | -- | -- | * | |
| Beta vulgaris | Root | -- | -- | List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979. | |
| Artemisia dracunculus | Shoot | -- | -- | * |