Why does eating turkey make you feel sleepy afterwards?

Eating turkey does not actually make you feel sleepy. The feeling of drowsiness after a meal, especially a large or heavy one, is commonly referred to as postprandial somnolence or "food coma." It's not specific to eating turkey but can occur after consuming any type of food that causes a significant rise in blood sugar levels followed by a drop.

When we eat, our bodies break down carbohydrates into glucose, which is used as energy. A sudden increase in blood sugar levels triggers the release of insulin, a hormone that helps cells absorb glucose. As insulin levels rise, glucose enters the cells, and blood sugar levels decrease. This drop in blood sugar can induce feelings of tiredness and a desire to relax or sleep.

Additionally, certain foods with high levels of certain amino acids like tryptophan may contribute to sleepiness. In the brain, tryptophan is converted into serotonin, a neurotransmitter involved in mood and sleep regulation. However, the amount of tryptophan in turkey meat alone is probably insufficient to cause a dramatic drowsiness post-meal.

Postprandial somnolence is normal and usually not caused for alarm. However, if the feeling of drowsiness becomes excessive or causes significant impairments in activities, or it's accompanied by other unusual symptoms, it's best to consult with a healthcare professional to rule out any underlying medical conditions.