| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Harpagophytum procumbens | Tuber | -- | -- | * | |
| Ocimum basilicum | Plant | -- | -- | Stitt, Paul. Why George should eat broccoli. | |
| Oenothera biennis | Fruit | -- | -- | * | |
| Oenothera biennis | Inflorescence | -- | -- | * | |
| Ginkgo biloba | Leaf | -- | -- | Jim Duke's personal files. | |
| Uncaria tomentosa | Bark | -- | -- | * | |
| Aleurites fordii | Plant | -- | -- | * | |
| Pterocarpus santalinus | Plant | -- | -- | * | |
| Theobroma cacao | Plant | -- | -- | * | |
| Brassica oleracea var. italica | Plant | -- | -- | Stitt, Paul. Why George should eat broccoli. | |
| Fritillaria thunbergii | Bulb | -- | -- | Chemical Constituents of Oriental Herbs (3 diff. books) | |
| Abrus precatorius | Seed | -- | -- | Wealth of India. | |
| Calendula officinalis | Flower | -- | -- | * | |
| Cymbopogon parkeri | Plant | -- | -- | Rizk, A.F.M., The Phytochemistry of the Flora of Qatar, Scientific and Applied Research Centre, University of Qatar, Kingprint, Richmond, UK, 1986. | |
| Tilia sp. | Wood | -- | -- | * | |
| Symphytum officinale | Root | -- | -- | * | |
| Moringa oleifera | Seed | -- | -- | * | |
| Cryptotaenia japonica | Shoot | -- | -- | * | |
| Euphrasia officinalis | Plant | -- | -- | * | |
| Inula helenium | Root | -- | -- | * |