An official website of the United States government.
| Chemical Name | Dosage | Reference |
|---|---|---|
| ZINC | not available | Duke, 1992 * |
| Plant Name | Common Name | Chemical Count | Total Parts Per Million |
|---|---|---|---|
| Psophocarpus tetragonolobus | Asparagus Pea; Goa Bean; Winged Bean | 1 | 153 |
| Pueraria pseudohirsuta | Chinese Kudzu | 1 | 30 |
| Pulsatilla chinensis | Chinese Anemone | 1 | 24 |
| Pyrus communis | Pear | 1 | 26.600000381469727 |
| Quercus alba | White Oak | 1 | 184.40000009536743 |
| Quercus phellos | Willow Oak | 1 | 92 |
| Quercus rubra | Northern Red Oak | 1 | 155 |
| Quercus stellata | Post Oak | 1 | 52 |
| Quercus velutina | Black Oak | 1 | 93 |
| Quisqualis indica | Rangoon Creeper | 1 | 22 |
| Raphanus sativus | Radish | 1 | 101 |
| Rehmannia glutinosa | Chinese Foxglove | 1 | 14 |
| Rheum palmatum | Chinese Rhubarb | 1 | 10 |
| Rheum rhabarbarum | Rhubarb | 1 | 46 |
| Rhizophora mangle | Red Mangrove | 1 | 43 |
| Rhodymenia palmata | Dulse | 1 | 39 |
| Rhus copallina | Dwarf Sumac; Winged Sumac | 1 | 448 |
| Rhus glabra | Smooth Sumac | 1 | 208 |
| Ribes nigrum | Black Currant | 1 | 21 |
| Ribes rubrum | Red Currant; White Currant | 1 | 32 |