| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Murraya sp | Fruit | 410.0 | 1181.0 | -0.9 | * |
| Musa x paradisiaca | Fruit | 410.0 | 1826.0 | -0.6 | USDA's Ag Handbook 8 and sequelae) |
| Myrciaria dubia | Fruit | -- | -- | Jim Duke's personal files. | |
| Nasturtium officinale | Herb | 600.0 | 12000.0 | 1.0 | * |
| Nelumbo nucifera | Rhizome | 600.0 | 2870.0 | 1.0 | * |
| Nelumbo nucifera | Seed | 2520.0 | 7636.0 | -0.6 | * |
| Nigella sativa | Seed | 4210.0 | 5385.0 | -1.0 | * |
| Ocimum basilicum | Leaf | -- | 5610.0 | -1.2 | USDA's Ag Handbook 8 and sequelae) |
| Oenothera biennis | Seed | 8300.0 | 8858.0 | -0.3 | * |
| Opuntia ficus-indica | Seed | -- | 7665.0 | -0.6 | Laferriere, J.E., 1988, Nutricomp Program, Nutricomp Database; reviewed in J. Ethnobiology 9(1):27-29. |
| Opuntia ficus-indica | Bud | -- | 3830.0 | Laferriere, J.E., 1988, Nutricomp Program, Nutricomp Database; reviewed in J. Ethnobiology 9(1):27-29. | |
| Oryza sativa | Plant | -- | -- | * | |
| Pachyrhizus erosus | Tuber | 470.0 | 4330.0 | -0.5 | * |
| Panax quinquefolius | Plant | 289.0 | 1240.0 | -1.3 | * |
| Panax ginseng | Leaf | -- | -- | * | |
| Panax ginseng | Root | -- | -- | * | |
| Papaver somniferum | Seed | 9870.0 | 10588.0 | 0.0 | * |
| Papaver bracteatum | Seed | 7400.0 | 8850.0 | -0.3 | * |
| Perideridia gairdneri | Root | -- | 2667.0 | -0.4 | Izadoost, M. & Robinson, T., Synergism & antagonism in the pharmacology of alkaloidal plants, pp 137-58 in Craker, L. & Simon, J., eds., Herbs, Spices & Medicinal Plants: Recent Advances in Botany, Horticulture & Pharmacology, v. 2, 1987, 255pp. |
| Persea americana | Fruit | 810.0 | 3148.0 | -0.2 | * |