In 1992, a study done by the Federation of American Societies for Experimental Biology (FASEB) on the safety of amino acids in dietary supplements warned about the use of manufactured free glutamate (MfG) in supplements.
That information was never shared with the public.
As early as 1990, the FDA became aware that MfG produced through acid hydrolysis of proteins contains carcinogenic mono and dichloro propanols that contribute to the development of cancer.
That information was never shared with the public.
Since 1990, the FDA has been thinking about sharing it.