The meat, but a lot of other foods do too. It is a myth that turkey makes you fall asleep.
http://www.snopes.com/food/ingredient/turkey.asp
The body uses tryptophan to create niacin.
It makes you sleepy
Niacin
yes from tryptophan
tryptophan is the amino acid precursor of niacin
Turkey has an amino acid called tryptophan, which helps the body produce serotonin, a chemical that plays a key role in sleep.
It is the Aegean Sea, which is part of the Mediterranean Sea.
sixteen ounces
Tryptophan is an amino acid that is important for building proteins. It is essential for normal growth and nitrogen balance. The body uses Tryptophan to make niacin which is a vitamin, and melatonin which is a hormone. The body also uses it to make serotonin, a neurotransmitter that plays an important role in depression and anxiety. Tryptophan can be used in the treatment of insomnia, depression, behavioral disorders, stress, and premenstrual syndrome (PMS).
Melatonin is made from the amino acid tryptophan. Tryptophan is an essential amino acid, that is, the body cannot make it; we need to get it through the foods we eat. Tryptophan is found in a wide variety of foods. As we consume tryptophan during the day, the body converts it into serotonin, an important brain chemical involved with mood. Serotonin, in turn, is converted into melatonin. This conversion occurs most efficiently at night.
tryptophan
Milk contains tryptophan which in the body converts to the sleep inducing hormones melatonin and serotonin.