| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Taraxacum officinale | Flower | -- | -- | * | |
| Urtica dioica | Plant | 1.0 | 10.0 | 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. | |
| Urtica dioica | Root | 3.0 | 36.0 | 1.0 | * |
| Urtica dioica | Flower | -- | -- | * | |
| Vaccinium corymbosum | Plant | -- | -- | * | |
| Viburnum opulus | Bark | -- | -- | ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes. | |
| Viburnum prunifolium | Fruit Juice | -- | -- | * | |
| Viburnum prunifolium | Root Bark | 4.0 | 90.0 | 1.0 | * |
| Viburnum opulus | Root Bark | -- | 7.5 | -1.0 | * |
| Viola odorata | Plant | -- | -- | * | |
| Withania somnifera | Plant | -- | -- | ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes. | |
| Zizyphus jujuba | Plant | -- | -- | * |