Add tryptophan synthenase

[Kovirii]

Isn't tryptophan the stuff that supposedly makes you sleepy when you eat turkey?

Yes, that's what they say, hence the possible side effects. The Tryptophan from turkey meat isn't that substantial when compared to eggs, some meats, cheese, seeds, and beans.
http://en.wikipedia.org/wiki/Tryptophan#...drowsiness