Is that really so surprising? Archive: https://archive.today/7qEQ4 From the post: >>A common supplement taken by millions of Americans could undo the damage caused by bad sleeping habits. Researchers analyzed the sleep patterns and levels of the sleep hormone melatonin in night-shift workers who work overnight and sleep during the day. Melatonin is crucial to the body's sleep-wake cycle and typically follows the light-dark cycle of the day - suppressed when it is light out and increased when it is dark out.