Guest guest Posted November 16, 1998 Report Share Posted November 16, 1998 Since tryptophan was taken off the market (except by prescription in Canada, I believe) I have purchased L-Tryptophan USP from www.biochemicals.com/ They sell if for pets. The label says " Assay>99.8%. Free of pyrogen and EBT " Unfortunately it did nothing for me except giving me a strange buzzing sound in the head which occured for an instant at random intervals. I got the same effect when using Tryptophan when it was on the market. Quote Link to comment Share on other sites More sharing options...
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