Travel Insights from Your Gut
Your luggage is packed, and your passport is in hand. You’re set to embark on the much-anticipated journey of the year. However, just a few hours into your travels, your stomach begins to churn. When you add new food experiences upon arrival and a disrupted sleep schedule into the mix, it’s easy to see how gastrointestinal discomfort can arise. Fortunately, there are effective strategies to protect your gut health while traveling.
Understanding Your Microbiome
The human body is home to a vast community of microorganisms. Specifically, the gut—referring to the gastrointestinal tract—is a rich environment hosting trillions of tiny life forms, including bacteria, viruses, fungi, and parasites.
While many of us have been conditioned to fear these microorganisms, they play a crucial role in our wellbeing. The gut microbiome significantly influences metabolism, hormonal balance, brain activity, and immune response, which is largely dependent on more than 70% of our immune cells residing in the gut.
Laura Nicholas, ND, the proprietor of Luna Health Clinic in Vancouver, emphasizes that people often see gut dysbiosis—the imbalance within the gut microbiome—as solely manifesting in digestive issues. In truth, the consequences are far-reaching, potentially affecting mental health by contributing to conditions such as anxiety and depression.
Moreover, the gut microbiome is key in managing inflammation, a major contributor to chronic conditions. Nicholas notes that dysbiosis can also be linked to various health issues like polycystic ovarian syndrome (PCOS), endometriosis, Hashimoto’s thyroiditis, bladder pain, and premenstrual syndromes.
Traveling at High Altitudes
Travel can significantly challenge the gut biome, especially when flying.
While the air in your living space typically maintains a humidity level of 40 to 60 percent, the air in an airplane cabin at cruising altitude is extremely arid. This low humidity level can result in dehydration, disrupting your gut microbiome by fostering harmful microbes and reducing immune cell counts.
Travelers often experience bloating and constipation during flights. As cabin pressure decreases, gas in the digestive system can expand by as much as 30 percent, causing discomfort and flatulence. Furthermore, long periods of immobility can slow down digestive processes and exacerbate constipation and bloating.
Additional Travel-Related Issues
Once you reach your destination, your gut may still face hurdles. “Irregular eating habits, new dietary experiences, dehydration, stress, and disrupted sleep patterns all affect your digestive system,” says Nicholas. “Even without exposure to pathogens, many travelers experience altered bowel habits—most frequently constipation.”
Traveler’s diarrhea is another common issue, affecting up to 40% of travelers. It usually results from contaminated food or water, and while it often resolves itself, it can also lead to post-infectious irritable bowel syndrome (PI-IBS).
Protect Your Gut
Conducting preventive measures can safeguard your gut health before and during your trip.
Get a Head Start
Set the tone for gut health by prioritizing nutritious meals and taking care of yourself ahead of your trip. Nicholas recommends that “preparation plays an essential role in supporting your gut while traveling. Focus on whole, minimally processed foods, stay hydrated, and limit your intake of alcohol and sugar, as these can disturb microbial diversity and weaken your immune response.”
Recommended Supplements
Utilizing a high-quality probiotic can enhance the balance of beneficial bacteria in your gut and augment your immune function before traveling. Nicholas also advocates for the use of Saccharomyces boulardii, a probiotic yeast that may help defend against traveler’s diarrhea and bacterial infections.
In addition, she advises using digestive enzymes with added hydrochloric acid to adapt to new culinary experiences and fend off harmful microbes that may disrupt your gut health.
To combat constipation, consider magnesium citrate, a gentle laxative that helps attract water into the intestines. Utilizing melatonin may assist in regulating your circadian rhythm while adjusting to new time zones, potentially lengthening and deepening your sleep, thus bolstering your immune system and lowering infection risk.
Moreover, drinking elderberry juice may enhance beneficial gut bacteria levels, while ginger can alleviate nausea if you happen to get sick.
Maintain Healthy Practices
While traveling, Nicholas suggests engaging in light physical activities, like walking or stretching, which can support your digestive system. Quickly adjusting your meal times and sleep schedule can also be beneficial for maintaining regularity.
During the flight, it’s wise to steer clear of carbonated beverages that can heighten bloating. As digestion tends to slow during prolonged sitting, opt for easy-to-digest meals rich in fiber, lean proteins, and healthy fats to mitigate discomfort.
Embrace the Bigger Picture
Being human implies that we coexist with countless unseen organisms residing around us and within us.
This reality means that traveling introduces new environments to your body: studies indicate that even those who do not suffer from gastrointestinal issues may return home with a temporarily modified microbiome. These shifts are part of the travel experience, but with the right planning and care, you can maintain gut health regardless of your travels.
This article was first featured in the November 2025 edition of Daitrl magazine.
