| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Moringa oleifera | Shoot | 4110.0 | 19260.0 | 1.3 | USDA's Ag Handbook 8 and sequelae) |
| Mucuna pruriens | Seed | 6250.0 | 13250.0 | 1.1 | * |
| Murraya sp | Fruit | 340.0 | 979.0 | -0.8 | * |
| Musa x paradisiaca | Fruit | 340.0 | 1321.0 | -0.7 | USDA's Ag Handbook 8 and sequelae) |
| Myrciaria dubia | Fruit | -- | -- | Jim Duke's personal files. | |
| Nasturtium officinale | Herb | 1330.0 | 26600.0 | 1.0 | USDA's Ag Handbook 8 and sequelae) |
| Nelumbo nucifera | Rhizome | 510.0 | 2440.0 | 1.0 | * |
| Nelumbo nucifera | Seed | 2000.0 | 6060.0 | -0.5 | * |
| Nigella sativa | Seed | 2615.0 | 3345.0 | -1.1 | * |
| Ocimum basilicum | Leaf | -- | 5880.0 | -1.3 | USDA's Ag Handbook 8 and sequelae) |
| Oenothera biennis | Seed | 3500.0 | 4600.0 | -0.8 | * |
| Opuntia ficus-indica | Seed | -- | 7330.0 | -0.2 | Laferriere, J.E., 1988, Nutricomp Program, Nutricomp Database; reviewed in J. Ethnobiology 9(1):27-29. |
| Opuntia ficus-indica | Bud | -- | 3845.0 | Laferriere, J.E., 1988, Nutricomp Program, Nutricomp Database; reviewed in J. Ethnobiology 9(1):27-29. | |
| Oryza sativa | Hay | -- | -- | * | |
| Pachyrhizus erosus | Tuber | 350.0 | 3225.0 | -0.7 | * |
| Panax quinquefolius | Plant | 584.0 | 1070.0 | -1.3 | * |
| Panax ginseng | Root | -- | -- | * | |
| Panax ginseng | Leaf | -- | -- | * | |
| Papaver somniferum | Seed | 9050.0 | 9708.0 | 0.4 | * |
| Papaver bracteatum | Seed | 6350.0 | 7800.0 | -0.1 | * |