| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Allium sativum var. sativum | Bulb | -- | 0.2 | * | |
| Allium sativum var. sativum | Plant | -- | -- | Stitt, Paul. Why George should eat broccoli. | |
| Chondrus crispus | Thallus | -- | -- | Jim Duke's personal files. | |
| Lentinus edodes | Fruit | -- | -- | * | |
| Lycium barbarum | Fruit | -- | -- | Leung, A. Y. and Foster, S. 1995. Encyclopedia of Common Natural Ingredients 2nd Ed. John Wiley & Sons, New York. 649 pp. | |
| Petroselinum crispum | Plant | -- | -- | Stitt, Paul. Why George should eat broccoli. |