Toxic L-tryptophan

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L-tryptophan Preface by Jeffrey Smith

In chapter 4 of my book, Seeds of Deception, I present the story of a deadly epidemic in 1989 that was linked to an L-tryptophan food supplement produced by genetically engineered bacterium. Much of the material was based on the research of William Crist, whose work is reproduced here.

I want to acknowledge William for his years of work, which has uncovered important information about this tragic event.

The material is presented in sequence.

First section: Introduction >>