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| Chemical Name | Dosage | Reference |
|---|---|---|
| SENKYUNOLIDE-N | 250 pg/ml | Duke, 1992 * |
| TRYPTOPHAN | 250 pg/ml | Duke, 1992 * |
| UMBELLIFERONE | not available | Duke, 1992 * |
| URUSHIOL | not available | Duke, 1992 * |
| XANTHOXYLIN | not available | Jeffery B. Harborne and H. Baxter, eds. 1983. Phytochemical Dictionary. A Handbook of Bioactive Compounds from Plants. Taylor & Frost, London. 791 pp. |
| Plant Name | Common Name | Chemical Count | Total Parts Per Million |
|---|---|---|---|
| Crataegus monogyna | Hawthorn; English Hawthorn | 2 | 0 |
| Crataegus rhipidophylla | Hawthorn | 5 | 14, 000 |
| Croton eluteria | Cascarilla | 1 | 0 |
| Croton lechleri | Sangre de Drago; Sangre de Grado; Sangre de Dragon; Dragons Blood | 3 | 0 |
| Cryptotaenia japonica | Japanese Cryptotaenia; Japanese Honewort; Mitsuba; Ya Er Qin; Stone Parsley | 1 | 0 |
| Cucumis melo | Cantaloupe; Melon; Muskmelon; Netted Melon; Persian Melon; Nutmeg Melon | 3 | 960 |
| Cucumis sativus | Cucumber | 4 | 1, 012 |
| Cucurbita foetidissima | Buffalo Gourd | 1 | 5, 472 |
| Cucurbita pepo | Pumpkin | 5 | 6, 550 |
| Cucurbita spp | Summer Squash | 1 | 1, 740 |
| Cuminum cyminum | Cumin | 2 | 300 |
| Cunila origanoides | Mountain Dittany; Frost Flower; Frost Mint; Maryland Dittany; American Dittany; Stone Mint; Dittany | 1 | 3, 528 |
| Curcuma longa | Turmeric; Indian Saffron | 5 | 641, 430 |
| Curcuma xanthorrhiza | Javan Turmeric; Temu Lawak | 2 | 60, 000 |
| Curcuma zedoaria | Shoti; Zedoary | 1 | 2, 000 |
| Cuscuta reflexa | Amarbel | 1 | 0 |
| Cyamopsis tetragonoloba | Guar; Cluster-Bean; Siam-Bean | 2 | 0 |
| Cymbopogon citratus | West Indian Lemongrass; Lemongrass | 1 | 0 |
| Cymbopogon flexuosus | East Indian Lemongrass | 1 | 0 |
| Cymbopogon parkeri | Skhabar | 2 | 0 |