Data Views Plants (>= 1 Chemical): 614 All Chemicals: 23 CSV Excel PDF Previous12 Show all rows. Paginate rows. Click on column headings to sort table by that column Chemical Dosage References VITAMIN-B3 --* VITAMIN-E 1,067 mg/man/day* YOHIMBINE --* *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.