Yet when 2 am hits, you’re still wide awake, mindlessly scrolling through Instagram, trapped in the grip of jet lag. But in the meantime, jet lag affects sleep, mood, and metabolism. A complete cure for jet lag is unlikely, but scientists have found ways to help our bodies keep up. “Even reducing jet lag by a day improves the productivity and well-being of so many people,” says Svetlana Postnova, a professor of neurophysics at the University of Sydney, speaking from over 10,000 miles and 10 time zones away. “If it were up to scientists like me who want to minimize jet lag, we’d flood the cabin with bright white light,” says Postnova.