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Total Plants: 538
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Plant Low PPM High PPM StdDev *Reference
Cimicifuga racemosa Root 365.0 1740.0 -0.4 *
Cimicifuga dahurica Rhizome -- 1450.0 -0.2 *
Cinnamomum aromaticum Bark 770.0 1680.0 -0.0 *
Cistanche salsa Plant -- 810.0 -1.0 *
Citrullus lanatus Fruit 1081.0 1500.0 -0.3 Leung, A. Y. and Foster, S. 1995. Encyclopedia of Common Natural Ingredients 2nd Ed. John Wiley & Sons, New York. 649 pp.
Citrus medica Fruit -- 950.0 -0.5 *
Citrus paradisi Fruit 15.0 3300.0 0.5 *
Citrus sinensis Fruit 98.0 1075.0 -0.5 *
Citrus reticulata Fruit 111.0 1416.0 -0.3 USDA's Ag Handbook 8 and sequelae)
Citrus aurantium Fruit 800.0 1730.0 -0.2 Suziki, A., Morimoto, I., and Okitzu, T., Elution of Metals from Crude Drugs, Shoykugaku Zasshi 36(3):190-195.
Cnicus benedictus Plant 235.0 1770.0 -0.7 *
Cnidium officinale Rhizome -- 850.0 -0.8 *
Cocos nucifera Seed 300.0 770.0 -0.9 Furr, A.K., et al. 1979
Coix lacryma-jobi Seed -- 1490.0 -0.6 Suziki, A., Morimoto, I., and Okitzu, T., Elution of Metals from Crude Drugs, Shoykugaku Zasshi 36(3):190-195.
Colocasia esculenta Leaf 200.0 3140.0 -0.4 *
Colocasia esculenta Root 200.0 1350.0 -0.6 *
Commiphora wightii Inflorescence -- -- Jim Duke's personal files.
Coptis japonica Rhizome 2240.0 2420.0 0.8 *
Coptis chinensis Rhizome 2240.0 2420.0 0.8 *
Coptis spp Rhizome 2240.0 2420.0 0.8 *
*Unless otherwise noted all references are to Duke, James A. 1992. Handbook of phytochemical constituents of GRAS herbs and other economic plants. Boca Raton, FL. CRC Press.