Hint: It’s probably more than the bird making you sleepy.

With the holidays fast approaching, many families are in preparation mode,meal planningandplacing ordersfor theircelebratory turkeys.

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What Is Tryptophan?

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Jordan Lye/Getty Images

Tryptophan is an essential amino acid thats a vital building block forprotein in the body.

(This is why they’re considered essential.)

Research has found that tryptophan also plays an important role in the gut microbiome-brain connection.

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Fred Hardy

Niacin is pivotal in energy metabolism and DNA production.

Does Tryptophan Actually Make You Sleepy?

Oftentimes, foods contain multiple amino acids, lessening tryptophan’s effects.

Slow-roasted lamb shoulder is pulled out of the oven and served inside a blue dutch oven.

Antonis Achilleos

Below are some high-tryptophan food sources to work into your diet year round.

Add a side of brown rice and you’ll up your tryptophan intake by another 67 mg per cup.

Another unlikely tryptophan source?

Steak-and-Potato Skewers With Orange Salsa Recipe

Victor Protasio

A cup of Valenica orange sections contains another 18 mg of tryptophan.

One cup ofcooked oatmealcan offer anywhere between 97 mg and 147 mg of tryptophan.

Oats are also an incredible source of soluble fiber, helping to regulate digestion and cholesterol levels.

Grilled Pork Chops with Peach-Parsley Salad Recipe

GREG DUPREE

Comparatively, 2 percent or reduced-fat milk contains 138 mg per cup.

Nuts and Seeds

Certain nuts and seeds are great vegan sources of tryptophan.

Soy

Soy products likeedamameand tofu contain a surprisingly high amount of tryptophan.

Two bowls of maple, pear, and pecan steel-cut oats displayed on a table with two spoons.

Brie Passano

One cup of cooked firm tofu offers an impressive 592 mg of tryptophan.

Edamame isn’t far behind, with one cup providing 416 mg.

Both tofu and edamame are loaded with fiber to help maintain a healthy gut microbiome and overall digestive health.

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Greg DuPree

Theyre also full ofpotassium, a keyelectrolytethats crucial in regulating heartbeat and muscle function.

Both canned tuna and fresh salmon contain a staggering 252 mg per 3 ounces.

When choosing seafood, keepsustainable practicesin mind.

Sweet and Salty Pumpkin Seeds Recipe

John Kernick

(Heres more on how to shop for sustainably produced seafoodour oceans will thank you!)

Beyond the role it plays in sleep, tryptophan has many additional benefits that shouldn’t be overlooked.

USDA Food Data Central.

Ginger and Honey-Soy Salmon en Papillote

“My Food Data.”

chickpea tuna salad

Parmigiano-Reggiano Scrambled Eggs

JENNIFER CAUSEY