“Altering bright light exposure and taking a nonprescription drug: A simple, at-home treatment — a single light box and the over-the-counter drug melatonin — allows travelers to avoid jet lag by resetting their circadian body clock before crossing several time zones, according to new research being published in The Endocrine Society’s Journal of Clinical Endocrinology and Metabolism. This treatment can also help those with delayed sleep phase syndrome (DSPS), a persistent condition that results from a misalignment between a person’s internal biological clock and the external social environment.”