Does turkey really make you sleepy?
Not especially. Turkey has about as much tryptophan as other meats; the post-feast slump comes from a huge, carb-heavy meal, often with alcohol.
Quick Answer
Turkey does contain tryptophan, an amino acid the body uses to make serotonin and melatonin, which play roles in sleep. But turkey isn’t special: it has about as much tryptophan as other meats, and some cheeses and soy foods have as much or more. Tryptophan also has to compete with other amino acids to get into the brain, so a protein-rich meal doesn’t deliver a sleepy dose. The real culprits behind the Thanksgiving slump are the sheer size of the meal, the load of carbohydrates from stuffing, potatoes, rolls and pie, and alcohol.
Key Facts
- Tryptophan in turkey
- About the same as in other meats
- Why it doesn’t knock you out
- It competes with other amino acids to reach the brain
- The real causes
- A very large meal, lots of carbohydrates, and alcohol
- Thanksgiving 2026
- Thursday, November 26
Where the post-dinner slump really comes from
- Tryptophan arrives
Turkey supplies tryptophan, and so do chicken, beef, cheese and soy.
- It hits a traffic jam
Other amino acids from the same protein-rich meal compete to enter the brain, so little extra tryptophan gets through.
- The feast does the rest
A huge meal packed with stuffing, potatoes, rolls and pie is the bigger factor.
- Add a glass of wine
Alcohol adds to the drowsiness.
The tryptophan myth
Tryptophan is an essential amino acid the body uses to make serotonin and melatonin, so it’s easy to see why it got the blame. But turkey contains about the same amount as other meats. If turkey made people sleepy, so would a chicken dinner.
Why a protein meal doesn’t sedate you
Protein-rich meals flood the bloodstream with several large amino acids that compete for entry into the brain. Tryptophan is just one of them, and not a dominant one.
What really causes the food coma
Thanksgiving dinners are huge and heavy on carbohydrates, from stuffing and potatoes to rolls and pie, and many include alcohol. Together, they’re far better explanations for the afternoon nap than the turkey itself.
Myth vs. Fact
MythTurkey is unusually high in tryptophan.
FactIt has about as much as other meats, and some cheeses and soy foods have as much or more.
MythThe tryptophan in turkey is what makes you nap.
FactEaten with other protein, tryptophan has to compete to reach the brain. The size of the meal, the carbs and the alcohol matter more.
The Bottom Line
Turkey isn’t the reason you nap after Thanksgiving dinner. Its tryptophan is ordinary for a meat; the giant, carb-heavy meal and the drinks are what make you drowsy.
