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Oral melatonin likely reduces jet lag symptoms for travelers crossing time zones. Further research is needed to determine potential adverse effects, though any are expected to be mild.

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Area of Science:

  • Sleep Medicine
  • Circadian Biology
  • Pharmacology

Background:

  • Jet lag syndrome is a circadian rhythm sleep disorder caused by rapid travel across multiple time zones.
  • Oral melatonin, a neurohormone regulating circadian rhythms, is a potential treatment for jet lag.
  • Existing evidence requires synthesis to clarify melatonin's efficacy and safety for jet lag.

Purpose of the Study:

  • To systematically evaluate the effectiveness and safety of oral melatonin for treating jet lag syndrome.
  • To synthesize evidence from randomized controlled trials through meta-analysis.
  • To provide a GRADE-based summary of findings regarding melatonin's impact on jet lag.

Main Methods:

  • Conducted a comprehensive search of 30 databases via the Epistemonikos database.
  • Identified and included four systematic reviews encompassing 11 randomized controlled trials.
  • Performed meta-analysis to combine evidence and utilized the GRADE approach for quality assessment.

Main Results:

  • Oral melatonin use is associated with a probable reduction in symptoms of jet lag syndrome.
  • The evidence regarding adverse effects of oral melatonin for jet lag is currently unclear.
  • Any potential adverse effects associated with melatonin use are likely to be mild.

Conclusions:

  • Oral melatonin is likely effective in mitigating symptoms of jet lag syndrome.
  • Further investigation is warranted to fully understand the safety profile of melatonin for jet lag.
  • Melatonin represents a probable therapeutic option for individuals experiencing jet lag disorder.