The Travel Agent's Jet Lag Protocol

Jet lag isn't inevitable. The travellers who routinely cross 8+ time zones without losing the first three days of a trip use a small handful of evidence-backed habits. None of them require supplements or special apps — just a little planning.

How jet lag actually works

Your body's circadian clock is set primarily by light (via the eyes) and secondarily by food timing, body temperature, and physical activity. When you cross multiple time zones, your internal clock is out of sync with the local sun. Every hour of mismatch translates roughly to a day of recovery — unless you accelerate the reset.

Before you fly

Shift gradually. Three days before an eastbound trip, go to bed an hour earlier each night. Before a westbound trip, go to bed an hour later. Even partial pre-adjustment shortens the post-arrival recovery.
Start hydrated. Cabin air is desert-dry. Begin your hydration the day before, not at the airport.
Sleep well the night before. Counterintuitive but key — arriving sleep-debted compounds jet lag dramatically.

On the plane

Reset your watch to destination time the moment you board. Eat and sleep on destination time, even if it feels weird relative to the cabin.
Skip alcohol. One glass of wine in pressurised cabin air dehydrates more than three glasses on the ground.
Move every 90 minutes. Walk the aisle, stretch, hydrate.
Use eye mask, earplugs and compression socks every flight, no exceptions.

The first 24 hours after arrival — the most important window

This is where 80 percent of the work happens.

Get morning sunlight on day one. 30 minutes outside, ideally on a walk, within the first three hours after sunrise local time. This single habit accelerates clock reset more than any other.
Avoid bright light at night. Dim the room, use blue-light filters, and avoid bright screens in the two hours before bed.
Eat on local time, even if you're not hungry. Three meals at local times tell your gut and your circadian system the same story.
If you nap, cap it at 20 minutes. Longer naps anchor your sleep cycle in the wrong place.

The strategic fast

Research from the Argonne National Laboratory found that fasting for 12–16 hours before your first local breakfast can speed circadian reset. The pattern: stop eating about 12 hours before your destination's breakfast time, then break the fast with a protein-rich meal at local breakfast time. Not magic, but a useful lever.

Caffeine, used carefully

Use caffeine only in the local morning and early afternoon, never after 2 p.m. local time. The half-life is about 5 hours; even a 4 p.m. coffee can sabotage your first proper local night of sleep.

Melatonin — yes, but small

0.3 mg to 0.5 mg of melatonin, taken about an hour before your target local bedtime for the first three nights, helps anchor sleep timing. Most over-the-counter doses (3 mg, 5 mg) are too high and produce next-day grogginess. Speak with a doctor if you're on other medications.

The "fake it" rule

Even if you feel terrible on day one, behave as a fully-rested local would. Get up at local breakfast time, walk outdoors, eat a real breakfast, work or sightsee through the day. By bedtime your body will be genuinely tired in the right time zone, and you'll sleep through.

Eastbound vs westbound

Eastbound (Europe to Asia, US to Europe) is harder for most people — you're shortening your day. Westbound (Europe to the US, Asia to Europe) is easier — you're lengthening it. Add an extra recovery day to eastbound itineraries when possible.

Long-haul, done right

A TravelTiger dossier includes a personalised jet-lag protocol for your specific itinerary, with light-exposure windows, meal timing, and recommended arrival-day activities. The first day of a trip should feel like the start of something extraordinary — not a sleepwalk through a hotel breakfast.