| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Eriodictyon californicum | Leaf | 2.6 | 12.0 | 0.5 | * |
| Eupatorium perfoliatum | Plant | 0.1 | 1.0 | -0.4 | * |
| Euphrasia officinalis | Plant | 0.1 | 0.5 | -0.4 | * |
| Fagopyrum esculentum | Seed | -- | 0.2 | -0.3 | Laferriere, J.E., 1988, Nutricomp Program, Nutricomp Database; reviewed in J. Ethnobiology 9(1):27-29. |
| Foeniculum vulgare | Fruit | -- | -- | * | |
| Foeniculum vulgare | Seed | 17.3 | 160.0 | 1.3 | * |
| Fragaria spp | Fruit | -- | 0.002 | -0.4 | ACTA AGRIC SCAND SUPPL 22: 1980 |
| Frangula purshiana | Bark | 0.3 | 1.1 | -0.5 | * |
| Fucus vesiculosus | Plant | 0.2 | 1.7 | -0.4 | * |
| Gentiana lutea | Root | 0.4 | 1.8 | -0.2 | * |
| Ginkgo biloba | Leaf | 0.5 | 2.0 | -0.2 | * |
| Glycine max | Seed | 0.04 | 2.6 | -0.2 | * |
| Glycyrrhiza glabra | Root | -- | 0.1 | -0.4 | * |
| Gymnema sylvestre | Leaf | 0.4 | 2.3 | -0.2 | * |
| Harpagophytum procumbens | Root | 0.3 | 1.5 | -0.3 | * |
| Hibiscus sabdariffa | Flower | 1.6 | 14.3 | 1.7 | * |
| Hordeum vulgare | Stem | -- | 24.0 | 2.7 | * |
| Humulus lupulus | Fruit | -- | 1.7 | 0.0 | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. |
| Humulus lupulus | Flower | 0.3 | 1.7 | -0.5 | * |
| Hydrangea arborescens | Root | 0.6 | 1.6 | -0.2 | * |