| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Corylus avellana | Wood | -- | -- | List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979. | |
| Coffea arabica | Seed | -- | -- | * | |
| Citrus paradisi | Plant | -- | -- | * | |
| Citrus sinensis | Fruit | -- | -- | * | |
| Areca catechu | Seed | -- | -- | * | |
| Aloe vera | Leaf | -- | 100.0 | Mandal, G., Das, A. 1980. Characterization of the Polysaccharides of Aloe barbadensis, Part I. Structure of the D-Galactan Isolated from Aloe barbadensis Miller. Carbohydr. Res. 86: 247-257. |