What can you can eat and drink to beat jet lag? Jet lag can have many different impacts. Having trouble staying asleep at night or feeling exhausted during the day and can really impact on your holiday, interfere with work or make your return home disntinctly unpleasant. It's not just what you eat, but combining it with when you eat that will have the greatest impact. Some foods will give you a pep, while others will help you sleep. Remeber to combine eating with properly timed light expose. Here's how do it.