| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Caulophyllum thalictroides | Root | 5.7 | 51.5 | -0.6 | * |
| Centella asiatica | Plant | -- | 138.0 | -0.6 | * |
| Centella asiatica | Leaf | 40.0 | 374.0 | -0.4 | * |
| Cephaelis ipecacuanha | Plant | -- | -- | * | |
| Chamaemelum nobile | Flower | -- | 267.0 | -0.8 | * |
| Chenopodium album | Plant | 600.0 | 9000.0 | 1.5 | * |
| Chenopodium ambrosioides | Leaf | 110.0 | 1020.0 | -0.3 | * |
| Chondrus crispus | Plant | -- | 130.0 | -0.6 | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. |
| Chrysanthemum coronarium | Bud | 370.0 | 4975.0 | * | |
| Chrysanthemum parthenium | Plant | -- | 330.0 | -0.5 | * |
| Chrysanthemum parthenium | Leaf | 59.0 | 330.0 | -0.4 | * |
| Chrysanthemum coronarium | Leaf | 270.0 | 4155.0 | -0.1 | * |
| Chrysobalanus icaco | Fruit | 90.0 | 1420.0 | -0.2 | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses |
| Chrysophyllum cainito | Fruit | 30.0 | 640.0 | -0.2 | * |
| Cicer arietinum | Seed | 30.0 | 56.0 | -0.3 | USDA's Ag Handbook 8 and sequelae) |
| Cichorium intybus | Root | 50.0 | 250.0 | -0.5 | * |
| Cichorium intybus | Leaf | 100.0 | 2040.0 | -0.3 | * |
| Cichorium endivia | Leaf | 462.0 | 9302.0 | 0.4 | * |
| Cimicifuga racemosa | Root | 28.0 | 135.0 | -0.6 | * |
| Cinnamomum verum | Bark | -- | 309.0 | 0.1 | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses |