Many people believe that eating turkey makes them sleepy, but the truth is more complicated. Turkey contains an essential amino acid called tryptophan, which contributes to the production of serotonin and melatonin, hormones that regulate mood and sleep
. However, tryptophan is also found in many other foods, and eating turkey alone is unlikely to make you feel sleepy
. Instead, the sleepiness is more likely due to overeating and consuming a large number of carbohydrates, which can cause post-meal fatigue
. Additionally, the holiday season and the relaxation that comes with it may also contribute to feeling sleepy after a big meal