Assertion: l tryptophan | /r/HasProperty | marketed as a sleep aid
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text: Turkey does contain tryptophan, an amino acid which is a natural sedative (to the extent that L-tryptophan has been marketed as a sleep aid); but to put an ordinarily awake person into a state of slumber it would generally have to be consumed on an empty stomach, in combination with little no other protein (which limits the absorption of tryptophan by the body), and in amounts larger than are typically gobbled even during a holiday feast.