“Electrolyte packets prevent or reduce jet lag.”
Electrolyte packets do not prevent jet lag or reset your body clock.
Drinking enough fluid on a long trip can keep the physical symptoms of jet lag from getting worse, and plain water does that as well as a packet. A packet will not reset your body clock or shorten jet lag.
Before your next trip across time zones, plan your light exposure and sleep times around your destination, and drink water as usual.
Jet lag is a body-clock problem, and a 2021 review of 23 trials of travel foods, drinks and supplements found good evidence for melatonin but none showing that fluids or electrolytes reset the body clock. The CDC says losing body fluid can make the physical symptoms of jet lag worse, which is a small grain of truth, but plain water covers that; no trial has tested the product itself, so this verdict rests on what is known about its ingredients, and confidence is limited.
Electrolyte packets do not prevent jet lag or reset your body clock. Jet lag happens because your body clock is out of step with the local time, and the things shown to help are timed light, shifting your sleep schedule and, for some people, melatonin. Staying hydrated can keep the physical symptoms from getting worse, but plain water does that just as well.
The CDC describes jet lag as a temporary mismatch between your internal clock and local time after crossing time zones. Its advice centers on bright light at the right time of day, shifting sleep by about 1 hour a day for 2 to 3 days before the trip, short naps, and low-dose melatonin (0.5 to 1 mg is often enough). The CDC also says to stay hydrated because losing body fluid can make the physical symptoms of jet lag worse; that advice is about drinking enough, not about electrolyte packets. In the 2021 review, pooled trials found melatonin reduced self-reported jet lag after both eastbound and westbound flights.
- Riedy SM, Williams SG. Jet Lag Disorder. CDC Yellow Book: Health Information for International Travel. Centers for Disease Control and Prevention. Last reviewed April 23, 2025
- Chan V, Wang L, Allman-Farinelli M. Efficacy of Functional Foods, Beverages, and Supplements Claiming to Alleviate Air Travel Symptoms: Systematic Review and Meta-Analysis. Nutrients. 2021;13(3):961. DOI: 10.3390/nu13030961. PMID: 33809656