| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Adiantum capillus-veneris | Leaf | -- | -- | * | |
| Ailanthus altissima | Leaf | -- | -- | * | |
| Ammi visnaga | Plant | -- | -- | * | |
| Ammi majus | Seed | -- | -- | * | |
| Aspalathus linearis | Shoot | -- | -- | * | |
| Hypericum perforatum | Plant | -- | -- | Leung, A. Y. and Foster, S. 1995. Encyclopedia of Common Natural Ingredients 2nd Ed. John Wiley & Sons, New York. 649 pp. | |
| Juniperus communis | Fruit | -- | -- | * | |
| Malus domestica | Fruit Juice | -- | -- | * | |
| Marrubium vulgare | Plant | -- | -- | * | |
| Morus alba | Fruit | -- | -- | * | |
| Nelumbo nucifera | Flower | -- | -- | * | |
| Psidium guajava | Leaf | -- | -- | * | |
| Tridax procumbens | Flower | -- | -- | ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes. | |
| Tussilago farfara | Plant | -- | -- | * |