| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Theobroma cacao | Seed | -- | 8800.0 | -0.3 | ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes. |
| Ribes nigrum | Fruit Juice | -- | 60.0 | * | |
| Valeriana officinalis | Rhizome | -- | -- | * | |
| Santalum album | Fruit | -- | -- | * | |
| Camellia sinensis | Leaf | -- | -- | * | |
| Zingiber officinale | Shoot | -- | -- | * | |
| Zingiber officinale | Tuber | -- | -- | * | |
| Tilia sp. | Flower | -- | -- | * | |
| Apium graveolens | Shoot | -- | -- | * | |
| Cryptotaenia japonica | Root | -- | -- | * | |
| Cryptotaenia japonica | Shoot | -- | -- | * | |
| Linum usitatissimum | Seed | -- | 0.248 | -2.0 | * |
| Aesculus hippocastanum | Leaf | -- | -- | Jim Duke's personal files. | |
| Trifolium pratense | Plant | -- | -- | * | |
| Fagopyrum esculentum | Seed | -- | 7110.0 | -0.7 | * |
| Vigna unguiculata | Seed | -- | 12030.0 | 0.3 | * |
| Angelica sinensis | Root | -- | -- | Jim Duke's personal files. | |
| Avena sativa | Seed | -- | 4000.0 | -1.3 | Jim Duke's personal files.* |
| Lentinus edodes | Fruit | -- | -- | * | |
| Salvia officinalis | Plant | -- | -- | Stitt, Paul. Why George should eat broccoli. |