A popular, but pricey, spice called saffron may be able to improve sleep quality in adults who often experience unrestful nights, according to a new study. The research comes from the same team that previously linked saffron with an antidepressant effect, at least in people who have up to moderate depression and who are also taking a prescription antidepressant medication. Saffron is a popular spice derived from the flower best known as ‘saffron crocus.’ The spice resembles a crimson-colored thread; it is plucked from the crocus flowers, meaning that unlike other spices, this one hard to gather in large quantities....