| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Withania somnifera | Leaf | -- | -- | * | |
| Zanthoxylum americanum | Root Bark | -- | -- | * | |
| Zea mays | Shoot | -- | -- | * | |
| Zea mays | Seed Oil | -- | -- | * | |
| Zea mays | Seed | -- | 1200.0 | -0.2 | * |
| Zea mays | Silk Stigma Style | -- | 1300.0 | * | |
| Zingiber officinale | Root | 100.0 | 500.0 | -0.3 | * |
| Zingiber officinale | Plant | -- | -- | * | |
| Zizyphus spina-christi | Plant | -- | -- | * |