| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Betula lenta | Leaf | -- | 556000.0 | -0.4 | Jim Duke's personal files.* |
| Chrysanthemum cinerariifolium | Shoot | -- | 794000.0 | 1.2 | * |
| Lycium chinense | Fruit | -- | 107000.0 | -3.6 | Hansel, R., Keller, K., Rimpler, H., and Schneider, G. eds. 1992. Hager's Handbuch der Pharmazeutischen Praxis, Drogen (A-D), 1209 pp., 1993 (E-O), 970 pp., 1994 (P-Z), 1196 pp. Springer-Verlag, Berlin. |
| Triticum aestivum | Seed | -- | 610000.0 | 0.3 | * |
| Cinnamomum verum | Plant | -- | -- | * | |
| Aloe vera | Leaf | -- | 896000.0 | 2.3 | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. |
| Humulus lupulus | Fruit | -- | 770000.0 | -0.1 | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. |
| Quercus alba | Seed | -- | 596200.0 | 0.3 | * |
| Berberis vulgaris | Bark | -- | 791000.0 | 0.2 | * |
| Eryngium floridanum | Shoot | -- | 643400.0 | 0.3 | * |
| Vigna aconitifolia | Fruit | -- | 731000.0 | -0.3 | * |
| Acacia decurrens | Plant | -- | -- | * | |
| Gliricidia sepium | Seed | -- | 34000.0 | -1.9 | * |
| Vigna aconitifolia | Leaf | -- | 738000.0 | 1.0 | * |
| Secale cereale | Leaf | -- | 848850.0 | 1.9 | ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes. |
| Albizia lebbeck | Seed | -- | 495000.0 | -0.1 | Wealth of India. |
| Agave americana | Plant | -- | 820000.0 | 1.0 | * |
| Cassia tora | Sprout Seedling | -- | 726000.0 | 0.8 | * |
| Hibiscus sabdariffa | Seed | -- | 557000.0 | 0.1 | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses |
| Phytelephas macrocarpa | Seed | -- | 916000.0 | 1.6 | * |