Summer is great for a lot of things. Your digestive routine usually isn’t one of them.

Between the flights, the road trips, the heat, the late dinners, the pool days that turn into late nights, and the general dissolution of anything resembling a schedule, summer has a way of throwing your gut completely off rhythm. If you’ve ever come back from vacation feeling bloated, backed up, or just generally off, you’re not imagining it.

Here’s what’s actually happening, and what you can do about it without giving up any of the fun.

Why Travel Throws Your Gut Off

Your digestive system runs on a schedule. Not a loose one either. Your gut has its own internal clock that syncs up with your body’s broader circadian rhythm, and that clock helps determine when your digestive muscles contract, when you get hungry, and when things move through your system.

Cross a few time zones and that whole system gets scrambled. Researchers have a name for it: “gut jet lag,” or the desynchronization between your body’s clock and your gut microbiome’s rhythm.[3] A 2024 cohort study found measurable changes in bowel habits and digestive discomfort in travelers even after a relatively short three-hour flight.[1]

Time zone changes are only part of it. Travel also disrupts:

• Meal timing (airport food at 11pm, skipped breakfast, whatever’s available)
• Sleep, which is closely linked to digestive rhythm
• Movement, since travel days are usually sedentary
• Access to your usual foods and your usual bathroom
• Hydration, especially on planes

None of these alone would derail you. All of them at once, for a week straight? That’s when your gut starts sending you feedback.[2]

And Then There’s the Heat

Even if you never leave town, summer itself is a variable. Higher temperatures mean more sweating, which means you’re losing fluid faster than usual, often without realizing it. And hydration is directly tied to how well your digestive system moves.

The Mayo Clinic notes that drinking plenty of water helps keep your digestive system on track.[4] When you fall short, digestion slows down and things get uncomfortable. A 2024 study found that water intake directly affects gut motility and stool consistency and that chronic underhydration can shift the balance of microorganisms in your gut.[5]

Summer makes this harder in a few specific ways. You're sweating more. You're outside more. And the drinks people reach for in the heat aren't always helping. The Mayo Clinic advises that fluids high in sugar, like sodas and some energy drinks, can actually be dehydrating rather than replenishing.[6] Alcohol works against you too, which is worth knowing when the patio round is the third one.

Add in the classic summer eating pattern (bigger portions, later meals, more fried and grilled food, more time between real meals) and it’s not a mystery why so many people feel off in July.

What Should You Drink on Vacation to Support Digestion?

This is the question worth answering directly, because what you drink on a trip has an outsized effect on how you feel.

The short answer: water first and then something that does more than just hydrate.
Water is non-negotiable. Especially on travel days and especially in the heat. Have some before you’re thirsty, not after.

Fermented drinks are the smart second. Fermented foods and beverages contain living probiotics that contribute to a diverse microbiome.[7] When your routine is in flux and your usual meals aren’t available, a fermented drink is one of the easiest ways to keep something consistent in your day.

What to go easy on. Not a lecture, just physics. Alcohol works against hydration, and sugary sodas can be dehydrating rather than replenishing.[6] You don't have to skip either. Just match them with water.

The Best Gut-Healthy Beverage for Travel

If you want one thing to keep in your bag, cooler, or hotel mini fridge, cans of Health-Ade Kombucha cans are hard to beat.

Here’s why they work well for travel specifically:

• They’re portable and packable. Cans travel better than glass, fit in a cooler or a beach bag, and don’t require a bottle opener or a plan.
• Powered by living probiotics, these cans provide a consistent source of probiotics even when the rest of your diet is unpredictable.
• Health-Ade Kombucha is refreshing in the heat. It’s Bubbly, cold, and tangy - genuinely satisfying on a hot day in a way plain water isn’t always.
• They’re an easy swap. Grab a can as an alternative to the third cocktail or the afternoon soda without it feeling like a compromise.

And if you didn’t pack any, you’re probably still fine. Health-Ade is stocked at grocery stores, natural retailers, and convenience stores across the country, so odds are you can find a bottle or can wherever you’ve landed. Check the store locator to see what’s near you!

How to Stay Regular on Vacation

A few habits that go a long way, none of which require you to plan your trip around your digestion.

1. Hydrate more than feels necessary: Especially on flights and especially in the heat. Fill a bottle after security. Alternate water with whatever else you’re having. This is the single highest-leverage thing on this list.
2. Keep one anchor habit: You can’t control everything on a trip but you can control one thing. Pick a single habit and keep it consistent. A Health-Ade Kombucha every afternoon, a walk after dinner, whatever’s easy. Consistency in one place buys you flexibility everywhere else.
3. Don’t skip fiber entirely: Vacation eating tends to be lower in vegetables and higher in everything else. You don’t need to overhaul the menu. Just add something green or fibrous where you can and take the fruit at breakfast.
4. Move a little every day: Physical activity supports gut motility and travel days are usually the most sedentary days of the year. A walk around the block, a swim, taking the stairs. It doesn’t need to be a full-blown workout.
5. Protect sleep where you can: Sleep and digestion are on the same clock. Late nights are part of summer and that’s fine but if you can get morning light and keep wake times somewhat consistent, your gut will resync faster.
6. Give it a few days: If things feel off for the first day or two of a trip, that’s normal and it usually resolves on its own as your body adjusts. Stay hydrated, keep moving, and don’t panic about it.

The Bottom Line

Summer is worth the disruption. Nobody should plan a vacation around their digestive schedule and the goal here isn’t to be precious about it.

But knowing why your gut feels off in July makes it a lot easier to do something about it. Drink more water than you think you need. Keep one habit consistent. Move a little. And pack something that hydrates and supports your gut at the same time.

Grab a few cans of Health-Ade Kombucha for the cooler and go enjoy your summer!

Sources

[1]  Journal of Clinical Medical Research (2024) — Traveler's Constipation: A Prospective Cohort Study

[2]  Medical News Today (2024) — How Does Jet Lag Affect Bowel Movements?

[3]  Frontiers in Nutrition (2025) — Gut Jet Lag: How Circadian Rhythm Disruption Undermines the Chrono-Microbiota-Motility Axis

[4]  Mayo Clinic — Water After Meals: Does It Disturb Digestion?

[5]  iScience / Cell Press (2024) — Sufficient Water Intake Maintains the Gut Microbiota

[6]  Mayo Clinic — Dehydration: Symptoms and Causes

[7]  PMC / NIH (2022) — Fermented Foods, Health and the Gut Microbiome

This content is for informational purposes only and is not intended as medical or nutritional advice. Always consult a healthcare professional with questions about your health.