Melatonin typically works in under an hour in most people, though factors such as your physical traits and the type of product used can vary this timing.

Chinese researchers said their study found tai chi to be as effective as talk therapy in long-term easing of insomnia in middle-aged patients.

People with chronic insomnia show a delayed and weakened daily rhythm of mental activity, keeping the brain in a more alert, daytime-like state at night.