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| Chemical Name | Dosage | Reference |
|---|---|---|
| TRANS-TRANS-5-ETHYL-4,6,7-TRITHIA-2,8-DECADIENE-4-S-OXIDE | not available | Duke, 1992 * |
| TROLOX | IC50 (uM) =1000 | Duke, 1992 * |
| URSOLIC-ACID | not available | Ringbom, T., Seguar, L., Noreen, Y., Perera, P., Bohlin, L. 1998. Ursolic Acid from Plantago major, a Selective Inhibitor of Cyclooxygenase-2 Catalyzed Prostaglandin Biosynthesis. J. Nat. Prod., 61(10): 1212-1215. |
| URUSHIOL | not available | Williamson, E. M. and Evans, F. J., Potter's New Cyclopaedia of Botanical Drugs and Preparations, Revised Ed., Saffron Walden, the C. W. Daniel Co., Ltd., Essex UK, 362 pp, 1988, reprint 1989. |
| ZINGERONE | not available | Duke, 1992 * |
| Plant Name | Common Name | Chemical Count | Total Parts Per Million |
|---|---|---|---|
| Pinus sylvestris | Scotch Pine | 3 | 169, 000 |
| Piper angustifolium | Matico | 1 | 0 |
| Piper betel | Betel Pepper | 2 | 22, 850 |
| Piper methysticum | Kava-Kava | 1 | 46, 106 |
| Piper nigrum | Black Pepper; Pepper; White Pepper | 5 | 0 |
| Piscidia piscipula | Jamaica Dogwood | 1 | 0 |
| Pistacia lentiscus | Mastic; Chios Mastictree; Mastictree; Mastixbaum (Ger.); Lentisco (Sp.) | 4 | 565, 000 |
| Pistacia vera | Pistachio | 1 | 0 |
| Pisum sativum | Pea | 2 | 500 |
| Plantago asiatica | Asian Plantain | 2 | 0 |
| Plantago major | Common Plantain | 6 | 57, 001 |
| Plantago ovata | Blond Psyllium; Ispaghula; Spogel Seeds; Psyllium; Indian Plantago | 1 | 0 |
| Plantago psyllium | Psyllium | 1 | 0 |
| Plectranthus amboinicus | Amboini Coleus; Country Borage; Cuban Oregano; French Thyme; Indian Borage; Soup Mint; Spanish Thyme; Mexican Mint | 3 | 3, 440, 000 |
| Plumeria acutifolia | Frangipani | 2 | 0 |
| Podocarpus koordersii | not available | 1 | 3.700000047683716 |
| Podophyllum hexandrum | Himalayan Mayapple | 3 | 12, 000 |
| Podophyllum peltatum | Mayapple | 4 | 50, 000 |
| Podophyllum pleianthum | Chinese Mayapple | 2 | 0 |
| Pogostemon cablin | Patchouli | 3 | 17, 000 |