This guide covers both halves: twelve practical tips for sleep, seating and light, and two simple, research-backed eating tricks that help with the energy slump travel brings. None of it requires changing your diet or buying much. It just takes a bit of timing.
😵💫 What is jet lag?
Jet lag is a temporary sleep disruption caused by crossing time zones faster than your body can adjust. Your internal body clock, the circadian rhythm, is still set to where you came from, while the world around you runs on a different schedule, and the mismatch leaves you tired, foggy and awake at the wrong hours.
It usually kicks in when you cross two or more time zones, and it is felt very individually: some people barely notice it, others are floored for days. Direction matters too. Traveling west is generally easier than east, because heading west lengthens your day, and it is easier for your body to stay up a bit later than to force sleep earlier. The classic symptoms are insomnia, fatigue and daytime drowsiness.
🥱 How to beat jet lag: 12 tips
1. Start adjusting before you travel. In the days before you fly, shift your sleep gradually toward your destination's time zone. On the plane, sleep only if it is nighttime where you are going, otherwise stay awake and relax, read, work or listen to something. The Timeshifter app does the maths for you and builds a personalized adjustment plan.
2. Use an upgrade if you have the miles. Lie-flat business or first-class seats make real sleep possible, which helps enormously on long hauls. Not affordable for most of us outright, but if you are sitting on airline miles, an eastbound or multi-timezone long-haul is the flight worth spending them on.
3. Consider an exit-row seat. The extra legroom helps some people, though it is personal, you cannot tuck your knees up the way you can in a regular seat. Worth it if you sleep better stretched out than curled up.
4. Sit toward the front. The back of the plane moves more in turbulence, and some rear rows near lavatories and galleys do not recline. Seats closer to the nose are steadier and more likely to recline. SeatGuru is useful for picking the right one.
5. Avoid blue light before you want to sleep. If you are trying to sleep on the plane, skip the screen, the blue light stimulates the circadian clock and keeps you alert, exactly the opposite of what you want. Use the time for an audiobook or podcast instead.
6. Skip sleeping aids on shorter flights. They can help on flights of ten hours or more, but on a five- or six-hour flight they can leave you groggy and actually worsen jet lag once you arrive, especially if you land in the morning.
7. Time your coffee to your destination. Whether to have coffee before or during the flight depends on what time it will be where you land. If it is evening at your destination, skip the caffeine so your body can start winding down on the new schedule.
8. Pack the right gadgets. Good earplugs, an eye mask and a neck pillow are small investments that make a real difference. Wax-cotton earplugs mould to your ear better than foam ones.
9. Move during the flight. Muscles stiffen on long flights. Get up now and then, walk the aisle, and stretch your shoulders, neck, back and hamstrings to keep your blood circulating.
10. Skip the in-flight alcohol. It is free with the ticket, but a beer or wine onboard works against your sleep and dehydrates you. Drink plenty of water before and during the flight instead.
11. Go easy on your schedule for the first few days. Do not land and walk into a deadline or an important video call the same day. Give yourself a buffer, arriving across several time zones is draining enough without stacking pressure on top.
12. Live on destination time the moment you land. Arrive in the morning and all you want is bed, but napping keeps you anchored to your old time zone. Push through to a normal local bedtime and your body adjusts far faster.
🍽️ What to eat to beat the slump
The tips above handle sleep and light. The other half of jet lag is energy, and that is where what you eat on travel days matters, because crossing time zones affects more than your sleep.
Early research suggests it also disrupts how your body handles blood sugar: in a 2022 study, healthy adults on eastbound transatlantic flights showed rising blood glucose and more time in hyperglycemia the longer the trip went on. [1] Layer a sugar-and-carb-heavy first meal on top of a body clock that is already thrown off, and the energy crash hits harder. Two simple tricks blunt it, without changing your diet.
Trick 1: Put protein first in your first meal
Your first meal sets your energy trajectory for the day, and that matters even more when travel has thrown off your body clock. Protein is the macronutrient most consistently linked to feeling full and to steady energy, [2] so a protein-forward first meal is enough on its own to help.
One thing to watch: do not default to reduced-fat protein foods like low-fat yogurt. Manufacturers often replace the fat with added sugar or starch to keep the taste, which works against you here. [3]
Trick 2: Eat in order
Eating the parts of a meal in a particular sequence slows the rapid rise of sugar in your blood, something shown in a clinical study on food order and post-meal glucose. [4] The order:
The order: vegetables and protein first, fats second, then starches and sugars last.
The best part is that it works with any meal, including hotel breakfast buffets and airport food, so you can use it anywhere without planning ahead.
Why it works
Both tricks do the same thing: they keep your glucose steadier and help you avoid the blood-sugar roller-coaster that travel already makes harder to manage. [1] Steady glucose does not just sustain energy, diets linked to steadier blood sugar have also been associated with better mood and lower long-term health risks. [5] Small changes, but on a travel day they punch above their weight.
🎯 Conclusion
Jet lag is beatable with a bit of planning rather than any special kit. Start shifting your clock before you fly, handle the flight well (steady seat, no blue light, no booze, plenty of water), and live on local time the moment you land. Then let food do the rest: a protein-forward first meal, eaten in order, to keep your energy steady while your body catches up. Do that and you will spend less of your trip in a fog, and more of it actually there.
Sources
1. Blankenship JM, Vetter C, Broussard JL. "Impairments in glycemic control during Eastbound transatlantic travel in healthy adults." SLEEP Advances. 2022;3(1):zpac009.
2. Paddon-Jones D, et al. "Protein, weight management, and satiety." American Journal of Clinical Nutrition. 2008;87(5):1558S-1561S.
3. Harvard Health Publishing. "There's no sugar-coating it: all calories are not created equal." (Citing Dr. David Ludwig, Harvard T.H. Chan School of Public Health.)
4. Shukla AP, et al. "Food order has a significant impact on postprandial glucose and insulin levels." Diabetes Care. 2015;38(7):e98-e99.
5. Schnabel L, et al. "Association between ultra-processed food consumption and risk of mortality among middle-aged adults in France." JAMA Internal Medicine. 2019;179(4):490-498.
