Here's Why You're Always Sleepy After You Eat

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Consuming Trytophan

Tryptophan is a type of amino acid found in protein-rich foods like eggs, meat, fish, and cheese. It helps your body produce serotonin, which can both boost your mood and lead to drowsiness. Turkey is one of the most notorious sources of tryptophan (hence the Thanksgiving food coma), but it also comes from lesser-known culprits like soy, spinach, nuts, and beans.