| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Myristica fragrans | Seed | 10.0 | 21.0 | 0.6 | * |
| Myristica fragrans | Aril | 6.0 | 25.0 | * | |
| Nardostachys chinensis | Rhizome | -- | 10.0 | -0.1 | * |
| Nasturtium officinale | Plant | -- | -- | * | |
| Nelumbo nucifera | Seed | -- | 17.0 | 0.2 | * |
| Notopterygium incisum | Rhizome | -- | 7.0 | -0.8 | * |
| Nyssa sylvatica | Stem | 0.3 | 31.0 | -0.5 | * |
| Nyssa sylvatica | Leaf | 1.25 | 182.0 | 4.2 | * |
| Ocimum basilicum | Leaf | -- | 14.0 | -0.4 | USDA's Ag Handbook 8 and sequelae) |
| Oenothera biennis | Seed | 11.0 | 13.0 | -0.2 | * |
| Ophiopogon japonicus | Tuber | 3.0 | 4.0 | -1.1 | * |
| Opuntia ficus-indica | Seed | -- | 3.4 | -1.0 | Laferriere, J.E., 1988, Nutricomp Program, Nutricomp Database; reviewed in J. Ethnobiology 9(1):27-29. |
| Origanum vulgare | Plant | -- | 9.0 | -0.6 | USDA's Ag Handbook 8 and sequelae) |
| Origanum majorana | Plant | -- | 11.0 | -0.3 | USDA's Ag Handbook 8 and sequelae) |
| Pachyrhizus erosus | Tuber | 4.0 | 25.0 | 1.9 | * |
| Paeonia moutan | Root Bark | 5.0 | 6.0 | -0.8 | * |
| Paeonia lactiflora | Root | 3.0 | 6.0 | -0.6 | * |
| Paeonia suffruticosa | Root Bark | 5.0 | 6.0 | -0.8 | * |
| Panax ginseng | Stem | -- | -- | * | |
| Panax ginseng | Flower | -- | -- | * |