Myth 6. Drinking a glass of warm milk will help you fall asleep.
The Truth: The theory is this: milk contains tryptophan (the amino acid best known for being in turkey), which when released into the brain produces serotonin—a serenity-boosting neurotransmitter. But when milk was tested, it failed to affect sleep patterns. “Tryptophan-containing foods don’t produce the hypnotic effects pure tryptophan does, because other amino acids in those foods compete to get into the brain,” explains Art Spielman, M.D., an insomnia expert and professor of psychology at the City University of New York.