Originally Posted by Dr. Smith

I thought of you yesterday as well. I was doing some reading/research about L-tryptophan, and came across this...

emphasis mine

See also: Effect of orally administered L-tryptophan on serotonin, melatonin, and the innate immune response in the rat

And FWIW... the reason I thought of you was the melatonin/sleep thing—not the rats.

Doc