Although turkey is closely associated with tryptophan, it actually contains ... you sleepy is somewhat based in science and somewhat in myth," says Cutler. It's much more likely that your feeling ...

Following is a transcript of the video. Dr. Daniel Barone: So the myth is that turkey has a lot of a chemical known as tryptophan, which is actually the precursor to melatonin. So people think ...

People often cite tryptophan as the cause of Thanksgiving drowsiness, but turkey itself does not actually make you sleepy. Tryptophan is an amino acid that regulates sleep. There's not enough of ...