For those of you trying to remember what it is in turkey that makes you drowsy, the word you're looking for is:
L-tryptophan: noun. an essential amino acid with a documented sleep inducing effect. (as found in turkey, of course).
Here's an important note. Don't leave off the 'L-'. Apparently plain old tryptophan is a non-sleep inducing generic variety of amino acid. Wouldn't want you sounding like a ning-nong.
So, when your father-in-law falls asleep on your couch after Thanksgiving dinner, you can impress everyone around you by teasing him with the accurate name of the soporific amino acid. :)
Just a head's up...I'll be taking the rest of the week off blogging to spend the holiday week with my wonderful family. You should be, too, by the way, so get off my blog and go hug your kids or something. That's right, I'm kicking you out...until Monday.