Jet Lag

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Travelling across time zones can trigger jet lag, a common condition that usually goes away within a few days. According to research or other evidence, the following self-care steps may be helpful:

What you need to know

  • Rest easy with melatonin
  • Improve sleep quality and avoid daytime drowsiness by taking 0.5 mg of this natural hormone at bedtime for four days after arriving at your destination
  • Take time to adjust
  • Give your body a chance to adapt to a new time zone by relaxing and limiting your activity for the first day or two

These recommendations are not comprehensive and are not intended to replace the advice of your doctor or chemist. Continue reading the full jet lag article for more in-depth, fully-referenced information on medicines, vitamins, herbs, and dietary and lifestyle changes that may be helpful.

About jet lag

Jet lag is a disturbance of the sleep-wake cycle triggered by travel across time zones.

Product ratings for jet lag

Science Ratings Nutritional Supplements Herbs
2Stars

Melatonin

  
3Stars Reliable and relatively consistent scientific data showing a substantial health benefit.
2Stars Contradictory, insufficient, or preliminary studies suggesting a health benefit or minimal health benefit.
1Star For a herb, supported by traditional use but minimal or no scientific evidence. For a supplement, little scientific support and/or minimal health benefit.
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What are the symptoms?

Jet lag causes a combination of symptoms, including daytime sleepiness, disorientation, poor concentration, fatigue, gastro-intestinal discomfort, headaches, difficulty falling asleep, and frequent waking from sleep. The symptoms can last from a day to a week or longer, depending on the person and the number of time zones crossed.

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Other therapies

Doctors usually recommend one to two days of rest or light activity upon arrival to allow for adjustment to the new time zone. Eating and sleeping patterns should be gradually shifted to fit the local time schedule during this period. In addition, medication schedules used for treating health conditions may need to be based on elapsed time rather than a specific time of day dosing.

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Vitamins that may be helpful

Melatonin is a natural hormone that regulates the human biological clock and may be helpful in relieving symptoms of jet lag, according to some,1 2 though not all,3 4 double-blind studies. One double-blind trial, involving international flight crew members, found that melatonin supplementation was helpful when started after arriving at the destination but not when started three days before leaving.5 Another double-blind study compared various amounts and forms of melatonin taken at bedtime for four days after the flight by people who travelled through six to eight time zones.6 Fast-release melatonin supplements were found to be more effective than the controlled-release supplements. A 5 mg and 0.5 mg fast-release melatonin were almost equally effective for improving sleep quality, time it took to fall asleep, and daytime sleepiness.

Are there any side effects or interactions?
Refer to the individual supplement for information about any side effects or interactions.

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References
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