Ranked by evidence
Best supplements for jet lag and travel
For jet lag, one supplement has good evidence: melatonin, taken at the right time in the new time zone. Everything below is ranked by the evidence for jet lag and travel fatigue, not by popularity, and with melatonin the timing matters more than the dose. Caffeine is here for sleepiness on arrival, not as a jet lag treatment.
Picks are ranked by the strength of published evidence for this goal in otherwise healthy adults. A persistent symptom needs a clinician's evaluation, and no supplement on this list replaces treatment.
Evidence last reviewed: September 2026
Top picks
Solid options
| Option | Evidence | Best for | The honest note | |
|---|---|---|---|---|
| Melatonin | Moderate evidence | crossing several time zones | A Cochrane review found it remarkably effective at preventing or reducing jet lag on trips across several time zones. Lower doses often work as well as higher ones, and it is prescription-only in much of Europe. | View |
| Jet Lag Formulas | Moderate evidence | melatonin in a travel pack | It works because of its melatonin, which is effective after flights crossing five or more time zones; the added herbs and vitamins have never been tested against melatonin alone. Taken at the wrong time, it can shift your clock the wrong way. | View |
| Caffeine + L-Theanine | Moderate evidence | focus after a short night | In a crossover trial in acutely sleep-deprived young adults, the combination improved selective attention. The effect is small and mostly comes from the caffeine. | View |
Popular for this goal — but the evidence says skip
- Motion Sickness Formulas Limited evidence
No ginger-plus-B6 travel formula has been tested in a randomised trial, and a comparison of seasickness agents ranked ginger among the weaker options.
- Altitude Support Formulas Limited evidence
In a rigorous placebo-controlled trial, 800 mg/day of Rhodiola did not prevent acute mountain sickness, and antioxidant vitamins also failed.
- Guarana Limited evidence
It works as a caffeine source, and no trial shows it outperforms plain caffeine at a matched dose.
- Rhodiola Rosea Limited evidence
Its fatigue trials are small, mostly at high or unclear risk of bias, and contradictory.
- Energy Support Formulas Limited evidence
No randomised trial has tested the blends as sold, and their B vitamins help energy mainly when you are deficient.
Our verdict
Plain melatonin, 0.5–5 mg at bedtime in the destination time zone for 2–5 days, is the pick; a branded jet lag formula adds nothing beyond its melatonin. Use caffeine early in the day for alertness, and skip altitude blends, motion-sickness capsules and adaptogen energy blends.