| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Aloe vera | Plant | -- | -- | Pakistan Encyclopedia Planta Medica. 1986. | |
| Aloe vera | Leaf | -- | -- | Mandal, G., Das, A. 1980. Characterization of the Polysaccharides of Aloe barbadensis Miller, Part II. Structure of the Glucomannan Isolated from the Leaves of Aloe barbadensis Miller. Carbohydr. Res. 87: 249-256. | |
| Amorphophallus konjac | Root | -- | -- | * | |
| Bletilla striata | Tuber | -- | -- | Chemical Constituents of Oriental Herbs (3 diff. books) | |
| Ginkgo biloba | Wood | -- | -- | Kameoka, H. and Nakai, K. 1987. Components of essential oil from the root of Glycyrrhiza-glabra. Nippon Gogeikagaku Kaishi 61(9): 1119-1122. | |
| Salix alba | Wood | -- | -- | * | |
| Salix alba | Bark | 13440.0 | 80000.0 | * |