| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Triticum aestivum | Oil | 1508.0 | 2170.0 | 2.5 | * |
| Lepidium sativum | Oil | -- | 1830.0 | 2.0 | * |
| Triticum aestivum | Seed | -- | 1271.0 | 3.3 | * |
| Rheum rhabarbarum | Leaf | 1197.0 | 1238.0 | 3.1 | * |
| Piper nigrum | Resin, Exudate, Sap | -- | 1000.0 | * | |
| Daucus carota | Leaf | -- | 788.0 | 1.5 | * |
| Brassica oleracea var. sabellica l. | Leaf | 359.0 | 785.0 | 1.5 | * |
| Phaseolus vulgaris | Leaf | 698.0 | 719.0 | 1.3 | Jim Duke's personal files.* |
| Helianthus annuus | Oil | -- | 622.0 | 0.2 | * |
| Hibiscus sabdariffa | Seed | -- | 500.0 | 0.9 | * |
| Carthamus tinctorius | Oil | -- | 449.0 | -0.0 | * |
| Brassica oleracea var. italica | Leaf | 7.0 | 439.0 | 0.4 | * |
| Brassica oleracea var. botrytis l. | Leaf | 7.0 | 439.0 | 0.4 | * |
| Beta vulgaris | Leaf | 321.0 | 439.0 | 0.4 | Jim Duke's personal files.* |
| Spinacia oleracea | Leaf | 12.0 | 419.0 | 0.3 | * |
| Trifolium pratense | Inflorescence | 126.0 | 400.0 | * | |
| Urtica dioica | Seed | 230.0 | 380.0 | 0.5 | 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. |
| Eucalyptus globulus | Leaf | -- | 333.0 | -0.0 | * |
| Abelmoschus esculentus | Oil | -- | 310.0 | -0.2 | ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes. |
| Abelmoschus esculentus | Seed | -- | 304.0 | 0.2 | Wealth of India. |