| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Vaccinium myrtillus | Fruit Juice | -- | 0.05 | 1.0 | * |
| Vaccinium corymbosum | Fruit Juice | -- | 0.02 | -1.0 | * |
| Mentha spicata | Leaf | -- | -- | Duke, J. A. Writeups or information summaries on approximately 2,000 economic plants, USDA, ARS, Beltsville, MD 20705. | |
| Juglans nigra | Essential Oil | -- | 26000.0 | * | |
| Glycyrrhiza glabra | Rhizome Essent. Oil | -- | -- | * | |
| Glycyrrhiza glabra | Root | -- | -- | * | |
| Citrullus lanatus | Fruit Juice | -- | -- | * | |
| Brassica oleracea | Stem | -- | 0.02 | * | |
| Mentha spicata | Essential Oil | -- | -- | * | |
| Citrus paradisi | Fruit | -- | -- | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses | |
| Camellia sinensis | Shoot | 600.0 | 1100.0 | * | |
| Zea mays | Silk Stigma Style | -- | -- | * | |
| Rosmarinus officinalis | Resin, Exudate, Sap | -- | -- | * |