| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Uncaria tomentosa | Root | -- | 3100.0 | * | |
| Uncaria tomentosa | Plant | -- | -- | Fernando Cabieses, 1994. | |
| Uncaria tomentosa | Stem Bark | 30.0 | 630.0 | * | |
| Uncaria guianensis | Plant | -- | -- | Fernando Cabieses, 1994. | |
| Uncaria tomentosa | Leaf | -- | 2800.0 | * | |
| Uncaria tomentosa | Root Bark | -- | -- | * |