Avoid drowsiness after holiday meal

Turkey is the most common main dish of a Thanksgiving dinner, to the point where Thanksgiving is sometimes colloquially called “Turkey Day”. Many of us take a nap after our Thanksgiving dinner- is this caused by eating this bird?

Somewhere between giving thanks and reaching for that second slice of grandma’s pumpkin pie, it hits—the “food coma.” While it’s common to feel tired after a big meal (especially a holiday meal), research shows it’s more than the tryptophan-filled Thanksgiving turkeys that can lead to a post-dinner snoozefest.

Don’t Blame the Bird—Why It Matters

The truth is, turkey doesn’t even contain that high a concentration of tryptophan, the sleep-inducing amino acid, compared to other types of poultry, pork, and even cheese. So what’s the science behind postprandial somnolence, the fancy name for the sleepy, sluggish feeling that strikes after eating a big meal?

For starters, the menu for the holiday meal does not tend to shy away from high-calorie and high-fat dishes. And when second (or third) helpings of those heavy-hitters go down, blood flows to the digestive system to ramp up its efforts. As a result, the rest of the body’s systems (including the brain) can start to feel a slowdown. Think of this as “rest and digest”— the opposite of the “fight or flight” response.

Another reason we feel the sudden need for zzz’s is thanks to high glucose levels in the blood stream. This triggers the release of insulin, which absorbs all amino acids—except for tryptophan.  Hello, heavy eyelids! Research also shows spikes in glucose can effectively switch off the neurons in the brain responsible for keeping us up and at ‘em. Glucose overload can also switch on the neurons that promote sleep (and turn us into those lazy couch potatoes).

So what is the real reason we feel sleep after the Thanksgiving dinner. It is probably a combination of factors including the cocktails we drank, the three plates of food that we ate, at least now you know that you have a good excuse to take that nap!

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