The United States Food and Drug Administration sets the maximum allowable levels of aflatoxin in food for direct human consumption at 20 ppb. 26 Food lots, either domestic or imported, found to contain 100 ppb on initial testing may be detained for further testing.  Raw peanuts with levels exceeding 25 ppb may be shipped to processors “if facilities are available to remove moldy or otherwise defective nuts from the lot before incorporation into the finished product.“29 Aflatoxin concentrations in pistachio nuts are measured by grinding the shell and nut together for testing, while brazil nuts are first shelled, then ground before testing.