| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Origanum majorana | Plant | -- | 11.0 | -0.3 | USDA's Ag Handbook 8 and sequelae) |
| Opuntia ficus-indica | Seed | -- | 3.4 | -1.0 | Laferriere, J.E., 1988, Nutricomp Program, Nutricomp Database; reviewed in J. Ethnobiology 9(1):27-29. |
| Ophiopogon japonicus | Tuber | 3.0 | 4.0 | -1.1 | * |
| Oenothera biennis | Seed | 11.0 | 13.0 | -0.2 | * |
| Ocimum basilicum | Leaf | -- | 14.0 | -0.4 | USDA's Ag Handbook 8 and sequelae) |
| Nyssa sylvatica | Stem | 0.3 | 31.0 | -0.5 | * |
| Nyssa sylvatica | Leaf | 1.25 | 182.0 | 4.2 | * |
| Notopterygium incisum | Rhizome | -- | 7.0 | -0.8 | * |
| Nelumbo nucifera | Seed | -- | 17.0 | 0.2 | * |
| Nasturtium officinale | Plant | -- | -- | * | |
| Nardostachys chinensis | Rhizome | -- | 10.0 | -0.1 | * |
| Myristica fragrans | Seed | 10.0 | 21.0 | 0.6 | * |
| Myristica fragrans | Aril | 6.0 | 25.0 | * | |
| Musa x paradisiaca | Fruit | 0.76 | 6.0 | -0.5 | * |
| Murraya sp | Fruit | 0.76 | 6.0 | -0.5 | * |
| Morus alba | Root Bark | -- | 6.0 | -0.8 | * |
| Moringa oleifera | Leaf | 1.0 | 4.0 | -0.7 | ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes. |
| Morinda sp | Root | 6.0 | 7.0 | -0.5 | * |
| Momordica charantia | Fruit | -- | 30.0 | 1.3 | =ICMR(Indian Council of Medical Research).1976.Medicinal Plants of India.Vol.1.Indian Council of Med. Res.Cambridge Printing Works, New Delhi.487 pp;ICMR.1987.Medicinal Plants of India.Vol.2.Indian Council of Med. Res.Cambr. Printing Works,New Delhi.600pp |
| Mentha spicata | Plant | 1.0 | 17.0 | 0.3 | * |