| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Terminalia arjuna | Bark | -- | 96.1 | Lin, T. C., Ma, Y. T., Hsu, F. L. 1996. Tannins from the Bark of Terminalia arjuna. Zhonghua Yaoxue Zashi 48 1: 25-35. | |
| Punica granatum | Bark | -- | -- | * | |
| Punica granatum | Plant | -- | -- | Williamson, E. M. and Evans, F. J., Potter's New Cyclopaedia of Botanical Drugs and Preparations, Revised Ed., Saffron Walden, the C. W. Daniel Co., Ltd., Essex UK, 362 pp, 1988, reprint 1989. | |
| Punica granatum | Stem Bark | -- | 900.0 | * | |
| Syzygium aromaticum | Leaf | -- | 9.7 | * |