| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Valeriana officinalis | Leaf Essent. Oil | 4000.0 | 335900.0 | 2.4 | * |
| Valeriana officinalis | Root Essent. Oil | -- | 315000.0 | 1.4 | * |
| Rosmarinus officinalis | Essential Oil | 18000.0 | 266000.0 | 2.1 | * |
| Plectranthus barbatus | Root Essent. Oil | -- | 200000.0 | -0.7 | * |
| Coleus barbatus | Root Essent. Oil | -- | 200000.0 | -0.7 | Jim Duke's personal files. |
| Ferula assa-foetida | Seed Essent. Oil | -- | 93300.0 | 1.0 | * |
| Ocimum basilicum | Essential Oil | 5200.0 | 90000.0 | 0.2 | * |
| Salvia officinalis | Leaf Essent. Oil | 1000.0 | 63500.0 | -0.0 | * |
| Salvia officinalis | Essential Oil | 17900.0 | 59000.0 | -0.1 | * |
| Salvia officinalis | Et | -- | 26000.0 | * | |
| Rosmarinus officinalis | Leaf Essent. Oil | -- | 25000.0 | -0.4 | * |
| Rosmarinus officinalis | Shoot Essent. Oil | -- | 16400.0 | 1.0 | * |
| Ocimum basilicum | Leaf Essent. Oil | 10000.0 | 14400.0 | -0.5 | * |
| Alpinia galanga | Leaf Essent. Oil | -- | 13800.0 | -0.5 | * |
| Pinus sylvestris | Leaf Essent. Oil | -- | 9600.0 | -0.5 | * |
| Myristica fragrans | Seed Essent. Oil | -- | 9000.0 | -1.0 | * |
| Tanacetum parthenium | Fruit Essent. Oil | -- | 7000.0 | * | |
| Tanacetum parthenium | Essential Oil | -- | 7000.0 | -0.7 | * |
| Ocimum basilicum | Shoot Essent. Oil | -- | 4700.0 | -1.0 | * |
| Coleus barbatus | Leaf Essent. Oil | -- | 4300.0 | -0.6 | Jim Duke's personal files. |