Vegas Guts: Is Chlorine Crashing Probiotic Youth?

Photograph of Franklin Everett ShawBy Franklin Everett Shaw
January 3, 2026

The desert sun beats down, the shimmering mirage of a pool beckons, and you, a dedicated swimmer in Las Vegas, dive in. But what about your gut? That delicate ecosystem is under constant assault from chlorine, and the unique challenges of the Vegas climate only amplify the problem. It’s time to ditch the “Vegas Guts” and take control of your digestive health.

Chlorine, while essential for pool sanitation, is a potent antimicrobial agent. It doesn’t discriminate between harmful bacteria and the beneficial bacteria that reside in your gut. This disruption, known as dysbiosis, can lead to a host of issues, from bloating and gas to weakened immunity and even mood disturbances.

But fear not, fellow desert dwellers! A strategic approach involving targeted probiotics, dietary adjustments, and pre- and post-swim protocols can help you maintain a healthy gut while enjoying your aquatic activities.

Let’s start with probiotics. Not all probiotics are created equal, especially when it comes to combating chlorine’s effects. You need specific strains known for their resilience and ability to repopulate the gut after chlorine exposure.

Here are a few key players to look for:

  • Lactobacillus rhamnosus GG: This strain is a powerhouse when it comes to gut barrier function. It helps strengthen the intestinal lining, preventing “leaky gut,” a condition where undigested food particles and toxins enter the bloodstream, triggering inflammation. Look for supplements containing at least 10 billion CFUs (colony-forming units) of this strain.

  • Bifidobacterium bifidum: This strain is particularly adept at breaking down complex carbohydrates and producing essential vitamins. It also helps to maintain a healthy pH balance in the gut, making it less hospitable to harmful bacteria. A daily dose of 5-10 billion CFUs is generally recommended.

  • Saccharomyces boulardii: Technically a beneficial yeast, S. boulardii is incredibly resilient and can withstand the harsh environment of the gut, even in the presence of chlorine. It helps to crowd out pathogenic bacteria and supports the growth of beneficial bacteria. Aim for 5-10 billion CFUs per day.

Now, let’s talk about diet. Living in Las Vegas presents unique dietary challenges. The dry climate can lead to dehydration, which can further disrupt gut health.

Here’s how to tailor your diet to support your gut:

  • Hydration is key: Drink plenty of water throughout the day, especially before and after swimming. Consider adding electrolytes to your water to replenish those lost through sweat. Coconut water is a natural source of electrolytes and can be a refreshing option.

  • Embrace fiber: Fiber is the food source for your beneficial gut bacteria. Load up on fruits, vegetables, and whole grains. However, be mindful of the types of fiber you consume. Inulin, a type of prebiotic fiber found in foods like onions and garlic, can be beneficial, but some people experience gas and bloating when consuming large amounts. Start slowly and gradually increase your intake.

  • Prioritize fermented foods: Fermented foods like sauerkraut, kimchi, and kombucha are naturally rich in probiotics. Incorporate these into your diet regularly to boost your gut flora. Be sure to choose unpasteurized versions to ensure the probiotics are still alive and active.

  • Limit processed foods and sugar: These foods can feed harmful bacteria and contribute to inflammation in the gut. Opt for whole, unprocessed foods whenever possible.

Next, let’s discuss pre- and post-swim gut support protocols. These simple steps can help minimize the impact of chlorine on your gut.

  • Pre-swim: Take a probiotic supplement 30-60 minutes before swimming. This will give the probiotics a head start in colonizing your gut. Consider consuming a small snack containing prebiotic fiber, such as a banana or a handful of almonds, to provide fuel for the probiotics.

  • Post-swim: Rinse off thoroughly with soap and water to remove any residual chlorine from your skin. Rehydrate with water and electrolytes. Consume a meal or snack rich in protein and fiber to help repair and rebuild your gut lining. Consider taking another dose of probiotics after swimming to replenish any beneficial bacteria that may have been lost.

Common pitfalls and how to avoid them:

  • Choosing the wrong probiotics: As mentioned earlier, not all probiotics are created equal. Select strains specifically known for their resilience and ability to combat chlorine’s effects. Read labels carefully and look for products that contain the strains mentioned above.

  • Not taking probiotics consistently: Probiotics are most effective when taken consistently over time. Make it a part of your daily routine, just like brushing your teeth.

  • Ignoring dietary factors: Probiotics are only one piece of the puzzle. You also need to support your gut health through diet and lifestyle choices.

  • Overdoing it with fiber: While fiber is essential, consuming too much too quickly can lead to gas and bloating. Start slowly and gradually increase your intake.

  • Dehydration: The dry Vegas climate can exacerbate the effects of chlorine on your gut. Stay hydrated by drinking plenty of water throughout the day.

Real-world application:

Let’s say you’re a regular swimmer at the Desert Breeze Aquatic Center in Las Vegas. You swim three times a week for an hour each time. Here’s a sample gut health protocol you could follow:

  • Daily: Take a probiotic supplement containing Lactobacillus rhamnosus GG, Bifidobacterium bifidum, and Saccharomyces boulardii. Drink at least 8 glasses of water per day. Incorporate fermented foods like sauerkraut or kimchi into your meals.

  • Pre-swim: Take your probiotic supplement 30 minutes before swimming. Eat a banana or a handful of almonds.

  • Post-swim: Rinse off thoroughly with soap and water. Rehydrate with water and electrolytes. Eat a meal containing protein and fiber, such as grilled chicken with roasted vegetables. Take another dose of probiotics.

By following these strategies, you can maintain a healthy gut while enjoying your swimming activities in Las Vegas. Don’t let “Vegas Guts” hold you back from living your best active life! Remember to consult with a healthcare professional or registered dietitian for personalized advice.

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