| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Matricaria recutita | Flower | 530.0 | 13200.0 | * | |
| Achillea millefolium | Plant | -- | 4845.0 | * | |
| Artemisia absinthium | Leaf | -- | 1700.0 | * | |
| Achillea moschata | Plant | -- | -- | * | |
| Pinus sylvestris | Leaf | -- | -- | Leung, A.Y., Encyclopedia of Common Natural Ingredients Used in Food, Drugs, and Cosmetics, John Wiley & Sons, New York, 1980. | |
| Pimpinella anisum | Essential Oil | -- | -- | * | |
| Ferula jaeschkeana | Plant | -- | -- | * | |
| Chamaemelum nobile | Plant | -- | -- | * | |
| Matricaria recutita | Plant | -- | -- | * |