“Eating turkey makes you sleepy.”

The idea that a serving of turkey inevitably leads to an afternoon nap is a widely accepted notion, particularly after holiday feasts. This common misconception likely stems from the prominence of turkey at large, celebratory meals, such as Thanksgiving, where post-meal drowsiness is almost a tradition. It's easy to pinpoint the main course as the culprit when everyone feels sluggish after a substantial spread.

While it is true that turkey contains tryptophan, an amino acid that plays a role in the production of serotonin and subsequently melatonin—hormones associated with sleep—this isn't the full picture. Turkey doesn't contain an exceptionally high amount of tryptophan compared to other common foods like chicken, beef, or even cheese. The real scientific explanation for that sleepy feeling lies in the overall composition of a large meal. Consuming a heavy, carbohydrate-rich feast, often accompanied by alcohol, triggers a cascade of physiological responses. These include significant blood sugar fluctuations and a redirection of blood flow to the digestive system to process the large amount of food, both of which contribute much more significantly to feelings of lethargy and sleepiness than the tryptophan in turkey.

People commonly believe this myth because the timing of the drowsiness so closely aligns with eating turkey during these big meals. It provides a simple, memorable explanation for a complex bodily reaction. The satisfaction and fullness from a large meal, combined with the social relaxation often associated with these gatherings, create the perfect conditions for a nap, regardless of the turkey on the plate. Ultimately, blaming the turkey for post-meal slumber is an oversimplification; the real cause is usually the entire indulgent dining experience.