| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Pisum sativum | Flower | -- | -- | * | |
| Polygonum aviculare | Plant | -- | -- | * | |
| Prunella vulgaris | Flower | -- | -- | Chemical Constituents of Oriental Herbs (3 diff. books) | |
| Punica granatum | Fruit | -- | -- | Seeram, N. P., Schulman, R. N., and Heber, D., eds. 2006. Pomegranates - Ancient Roots to Modern Medicine. Taylor & Francis. Boca Raton, FL. 244 pp. | |
| Ribes nigrum | Plant | -- | -- | * | |
| Salix alba | Leaf | -- | -- | * | |
| Solanum melongena | Fruit | -- | -- | * | |
| Trifolium pratense | Plant | -- | -- | * | |
| Vaccinium myrtillus | Fruit | -- | -- | * | |
| Vaccinium corymbosum | Fruit | -- | -- | * | |
| Vitis vinifera | Plant | -- | -- | * | |
| Zingiber officinale | Plant | -- | -- | Stitt, Paul. Why George should eat broccoli. |