Data Views Exclude Ubiquitous Chemicals Activities: 125 Chemicals w/Activities: 21 All Chemicals: 42 CSV Excel PDF Show All Paginate Previous123 Click on column headings to sort the list on the column # Activity Chemical Part All parts ... Bark Fruit Gum Heart Wood Leaf Plant Seed Stem Bark Low PPM High PPM StdDev *Reference 35 35 TANNIN Leaf -- -- * 35 35 TANNIN Bark -- -- * *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.