March 3, 2026
Hi Everyone,
You've probably tried some version of jet lag advice before – drink water, avoid alcohol, sleep on the plane – and landed feeling foggy anyway.
The science of circadian rhythm, together with a small set of well-timed interventions, can cut jet lag severity roughly in half for trips crossing five or more time zones.
We've distilled the research into five tools you can set up in 10 minutes before your next flight.
The five tools, in order of impact
These are ranked by strength of evidence. You don't need all five, but the more you stack, the faster you adapt.
1. Timed light exposure
Light is the strongest signal your body uses to set its internal clock. When you land, get outside in the morning for at least 30 minutes. Bright natural light tells your brain to shift toward local time.
Research shows that medium-to-high intensity light exposure for 1 to 4 hours produces circadian shifts of roughly 2 to 3.5 hours – enough to significantly shorten adaptation time.
If you're traveling east, morning light helps you set your clock forward. If you're traveling west, evening light helps you delay it. The timing matters more than the duration.
2. Low-dose melatonin at destination bedtime
Take 0.5 to 3 mg of immediate-release melatonin about 30 to 60 minutes before your target bedtime in the new time zone. Do this for three to four nights after arrival.
A Cochrane-level review across multiple randomized trials found that melatonin at this dose range reliably reduced jet lag scores, with the strongest effects on trips crossing five or more time zones.
Two details worth knowing:
- Immediate-release works better than slow-release for shifting your clock,
- Doses above 5 mg don't add meaningful benefit (but they increase the chance of morning grogginess)
3. Sleep banking before you go
In the two to three nights before departure, aim for 60 to 90 minutes of sleep each night if you can.
Go to bed earlier, sleep in a bit, or both.
This doesn't prevent jet lag, but it gives you a buffer. A 2023 review in the Journal of Clinical Medicine found that pre-travel sleep extension reduced the severity of post-arrival symptoms and improved cognitive function on landing.
Even one night of extra sleep helps. Two nights are better.
4. Caffeine with a hard cutoff
Caffeine is useful for bridging alertness gaps on the first day or two after arrival, but it backfires if it's too close to bedtime.
A review in Sleep Medicine Reviews confirmed that caffeine consumed within 6 hours of intended sleep delays both sleep onset and melatonin release, thereby slowing adaptation.
Use it in the morning. Cut it off by early afternoon. One or two cups of coffee, timed well, is more effective than three cups spread across the day.
5. Short naps (15 to 30 minutes, no longer)
When afternoon fatigue hits, a short nap restores alertness without disrupting your ability to fall asleep that night.
Keep it under 30 minutes to avoid waking from deep sleep, which can make grogginess worse.
The best time is between 1 and 3 pm local time, when your energy naturally dips. Set an alarm. Longer naps feel tempting but tend to push your bedtime later, which delays adaptation.
What doesn't help
A few popular approaches lack or have weak evidence.
- Extended-release melatonin can actually work against you. Because it releases melatonin over several hours, it can sustain the hormone at the wrong time in your cycle and reinforce the misalignment you're trying to fix.
- Focus supplements rarely outperform caffeine in controlled studies, and caffeine is often their active ingredient anyway.
- Forcing yourself to stay awake until local bedtime sounds logical, but often backfires. If you arrive severely sleep-deprived, a short nap followed by an early-ish bedtime with melatonin tends to work better than white-knuckling it to 10 pm.
Go deeper
👉 Timeshifter: Jet lag and duty of care for business travelers – a solid overview of why organizations should treat jet lag as a performance issue, with links to their scheduling tool
👉 PMC / Sleep Medicine Reviews: Jet lag — therapeutic use of melatonin and management strategies – a thorough review of melatonin dosing, timing, and formulation evidence
👉 Chief Executive Magazine: Executive travel wellbeing — essential rules – practical travel habits from a corporate wellness perspective
Coming up tomorrow
Thanks for reading. Tomorrow we'll talk about why your confidence level is probably off, and five questions to ask before your next big decision.
P.S. What's your go-to jet lag remedy? Melatonin, coffee timing, brute force, something else? Let us know, we’re curious what works for you.