Does tryptophan *really* make you sleepy? Here’s the truth
“Tryptophan is an amino acid that increases serotonin levels in the body,” she says. “Serotonin is a precursor to melatonin, a hormone that helps regulate sleep.” In other words, tryptophan could help your body to produce more of this sleepy hormone, but how much do you need to consume for this effect to kick in?
http://www.wellandgood.com/good-food/turkey-tryptophan-sleep-facts/
Liberals are like a "Slinky". Totally useless, but somehow ya can't help but smile when you see one tumble down a flight of stairs!
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