Many travelers look forward to a dream vacation, only to spend the first few days feeling tired, having trouble sleeping, and dealing with stomach issues. While these symptoms are often blamed on classic jet lag, a new report suggests that time zone changes can also affect the trillions of bacteria living in the gut.
Researchers from Wroclaw Medical University in Poland reviewed evidence showing that long-haul flights disrupt the body's internal clock, which in turn can throw off the balance of gut microbes. These bacteria play a key role in digestion, energy levels, and even mood. When their rhythm is disturbed, travelers may experience low energy, digestive problems, and general discomfort.
The scientists point out that this "gut jet lag" may contribute to why some people waste the first days of their vacation feeling unwell. They recommend strategies to help the gut adjust more quickly, such as gradually shifting meal times before travel, staying hydrated, and eating fiber-rich foods.
While more research is needed, the findings highlight that jet lag is not just about feeling sleepy—it can affect the entire body. Understanding how the gut responds to time zone changes could help travelers recover faster and enjoy more of their trip.