i just found this while doing some research on it...as i too am an insomniac...i am on lunesta and it helps...i still don't get 8 hours of sleep...i prob get about 3-4 every night. can't remember the last time i got 8 hours...
Is tryptophan safe as a dietary supplement?
L-tryptophan was a very popular sleeping aid in the United States until recently, and was also used for premenstrual syndrome and depression. The FDA (Food and Drug Administration) removed it off the market in 1990 because of a sudden outbreak of eosinophilic-myalgia syndrome among people who had taken the supplement. About 5,000 people got sick and 27 died.
The ailment Eosinophilic-myalgia is characterized by muscle pain, weakness, and joint pain. It is serious and sometimes fatal. An investigation into the connection with L-tryptophan traced the problem to a contaminated batch of the supplement made by a Japanese company, Showa Denko KK, which had changed its fermentation process to incorporate genetically engineered bacteria, and had also lessened the amount of charcoal it used to purify the product. Nevertheless, the FDA did not relax its ban, reasoning that it's still not clear whether manufacturers can make a product that isn't toxic. However, L-tryptophan is still available by prescription in Canada.
Of course, this does NOTt mean that the tryptophan that occurs naturally in foods, like turkey is harmful! The tryptophan that occurs naturally in foods, like turkey, is perfectly safe.