| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Glycyrrhiza glabra | Root Essent. Oil | -- | -- | * | |
| Vaccinium myrtillus | Fruit Juice | -- | -- | * | |
| Capsicum annuum | Fruit | -- | -- | * | |
| Aesculus hippocastanum | Flower Essent. Oil | -- | -- | Jim Duke's personal files. | |
| Ananas comosus | Fruit | -- | -- | * | |
| Glycyrrhiza glabra | Root | -- | -- | * |