The urban legend about how the tryptophan in turkey makes you tired is as much a Thanksgiving tradition as stuffing and cranberries. Like many long-told tales, there's a grain of truth amid a helping of misinformation.
In this Mayo Clinic Minute, dietitian Katherine Zeratsky sets the record straight and explains why tryptophan isn't the only reason you may want to grab a nap on Thanksgiving day. Jeff Olsen reports.
Journalists: Broadcast-quality video pkg (1:00) is in the downloads. Read the script.