Don't blame the turkey. Here's what experts say is really behind your food coma

Don't blame the turkey for your post-meal sleepiness, experts say.

Do you believe in the holiday food coma?

Many people do. A mainstay on the dinner table at this time of year, turkey contains tryptophan, which is widely believed to be responsible for the uncontrollable yawns and sudden snoozes common after huge family feasts.