| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Salvia officinalis | Plant | -- | -- | Stitt, Paul. Why George should eat broccoli. | |
| Allium sativum var. sativum | Leaf | -- | -- | * | |
| Silybum marianum | Seed | -- | -- | * | |
| Cryptotaenia japonica | Root | -- | -- | * | |
| Melia azedarach | Plant | -- | -- | * | |
| Echinacea purpurea | Plant | -- | -- | Leung, A. Y. and Foster, S. 1995. Encyclopedia of Common Natural Ingredients 2nd Ed. John Wiley & Sons, New York. 649 pp. | |
| Lycium chinense | Leaf | -- | -- | List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979. | |
| Stachys officinalis | Shoot | -- | -- | * | |
| Lentinus edodes | Fruit | -- | -- | * | |
| Angelica sinensis | Root | -- | -- | Jim Duke's personal files. | |
| Oryza sativa | Plant | -- | -- | * | |
| Coriandrum sativum | Fruit | -- | -- | * | |
| Camellia sinensis | Leaf | -- | -- | * | |
| Plantago ovata | Seed | -- | -- | * | |
| Cocos nucifera | Endosperm | -- | -- | Jim Duke's personal files. | |
| Cocos nucifera | Leaf | -- | -- | Jim Duke's personal files. | |
| Alpinia galanga | Leaf | -- | -- | * | |
| Prunus cerasus | Fruit | -- | -- | * | |
| Crocus sativus | Bulb | -- | -- | * | |
| Pinellia ternata | Tuber | -- | -- | * |