Here's the real reason Thanksgiving makes you sleepy

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No Thanksgiving is complete without a turkey at the table—and a nap right after it’s eaten. The meat has a bad reputation for making eaters sleepy, but is there really science to back that up?

Here’s the lowdown: turkey contains the amino acid L-tryptophan, which produces sleep-promoting serotonin and melatonin. But turkey has about the same amount of tryptophan as other meats. It may even have a built-in secret weapon against sleepiness: an abundance of protein, which can regulate insulin levels and actually combat fatigue. So don’t blame the turkey for your tiredness; the heavy load of carbs that made up the rest of the meal are likely the culprits. Here’s what turkey really does to your body.

By Alexandra Sifferlin and Heather Jones