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Why does Thanksgiving dinner make you sleepy?

Written by Abigail Sawyer (Senior Editor)

Thanksgiving dinner, sleepy

If falling asleep on the couch after Thanksgiving dinner is also an annual tradition, you might want to read on… The idea that eating turkey can make you sleepy appears to be nothing more than an urban legend. However, is there some truth in this? Let’s investigate the science behind the claims. Turkey is a good source of the amino acid tryptophan, which is commonly credited as being the “stuff in turkey that makes you sleepy,” according to the characters in a 1997 episode of ‘Seinfeld’ – the supposed introduction of the myth into the mainstream. Tryptophan can be a...

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