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Total Plants: 2
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Plant Low PPM High PPM StdDev *Reference
Harpagophytum procumbens Root -- 28.0 *
Harpagophytum procumbens Plant -- -- Newall, C. A., Anderson, L. A. and Phillipson, J. D. 1996. Herbal Medicine - A Guide for Health-care Professionals. The Pharmaceutical Press, London. 296pp.
*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.