| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Cocos nucifera | Seed | 585.0 | 7190.0 | * | |
| Glycyrrhiza glabra | Root | -- | 148.0 | * | |
| Morinda citrifolia | Fruit | -- | 8.0 | 1.0 | * |
| Rheum palmatum | Rhizome | -- | 2.5 | * | |
| Asimina triloba | Fruit | -- | 0.001 | -1.0 | * |
| Citrullus colocynthis | Petiole | -- | -- | * | |
| Prunus persica | Fruit | -- | -- | * | |
| Cinnamomum aromaticum | Plant | -- | -- | * | |
| Capsicum frutescens | Fruit | -- | -- | * | |
| Capsicum annuum | Fruit | -- | -- | * | |
| Saussurea lappa | Root Essent. Oil | -- | -- | * | |
| Aspalathus linearis | Plant | -- | -- | * | |
| Piper nigrum | Fruit | -- | -- | * | |
| Melissa officinalis | Tissue Culture | -- | -- | Gbolade, A.A. and Lockwood, G.B. 1991. The Constituents of Melissa officinalis L. Cultures. J. Ess. Oil Res., 3: 111-114. | |
| Elettaria cardamomum | Fruit | -- | -- | Leung, A. Y. and Foster, S. 1995. Encyclopedia of Common Natural Ingredients 2nd Ed. John Wiley & Sons, New York. 649 pp. | |
| Eruca sativa | Hs | -- | -- | * |