Beat Jet Lag
Shift your body clock deliberately with timed light and a correctly-timed low dose of melatonin, so you land closer to local time instead of writing off the first three days.
Work out whether you need to advance or delay East = advance (shift earlier); West = delay (shift later). Expect ~1 day per time zone, a little longer eastward
The whole protocol flips depending on direction; getting this wrong makes jet lag worse.
Nudge your schedule 2 to 3 days early for long trips Crossing 5+ zones: shift sleep and light an hour per day toward the destination before departure
Pre-shifting means you land already part-way adjusted.
Get bright light at the right end of your day Eastward: bright morning light at destination. Westward: evening light. Get outside; daylight beats any lamp
Timed light is the most powerful lever for resetting the clock.
Block light at the wrong end of your day If local morning light would shift you the wrong way, wear sunglasses outside and use an eye mask until mid-morning
Blocking ill-timed light protects the shift you are trying to make.
Take 0.5mg at destination bedtime, correctly timed 0.5mg (not 5 to 10mg) at target local bedtime, for the first few nights; eastward mainly. Skip it westward unless advised
0.5mg matches 5mg for phase-shifting with fewer side effects; timing matters more than dose, and the wrong time backfires.
Eat, move and sleep on the destination clock from arrival Adopt local meal times and daylight activity immediately; nap only briefly (under 30 min) if desperate
Meal timing and activity are secondary clock signals that reinforce the light shift.
Hydrate well; avoid alcohol in flight Water and electrolytes; alcohol fragments sleep and worsens the adjustment
Alcohol degrades sleep quality exactly when you need recovery sleep.
Light is the dominant signal to the circadian clock; morning light advances it and evening light delays it.
View sources
Jet Lag Disorder: clinical guidance on light timing and melatonin (CDC Yellow Book)
Circadian rhythm and light: morning light advances, evening light delays the clock
Phase shifts and amplitude reduction of circadian rhythms after timed light and sleep shifts (NIH/PMC)
Not medical advice. This page is for education only and is not a substitute for professional medical care. Consult a qualified clinician before changing your health routine.
Editorial disclosure. This protocol is written and fact-checked by the YourProtocol editorial team directly from the primary sources cited below; it is not written or reviewed by any outside expert.
Is this for you
- Frequent flyers and long-haul travelers
- Anyone crossing 3+ time zones
- Business travelers who must perform on arrival
- People who lose days to every trip
Cautions
- Timing is everything: melatonin taken at the wrong hour can shift your clock the wrong way and worsen jet lag; if unsure, lean on light and skip the pill
- Melatonin is a supplement, not regulated like a drug; dose and quality vary between brands, so choose third-party tested and start at 0.5mg
- Pregnancy, on medications (including blood thinners or sedatives), or any medical condition: check with a doctor before using melatonin
- For trips of only 1 to 2 time zones, a full night of sleep and daylight on arrival is usually enough; you may not need anything here
- Sunlight, an eye mask and a local schedule are the free core
- Educational only, not medical advice
- Manta Sleep
Some links earn us a commission. It never affects our picks or grades. See our affiliate disclosure.