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Hydration and Gut Health: Why Water Intake Matters

Water is good for digestion
Hydration and gut health

As we strive to live healthier lives, we often focus on aspects like diet, exercise, and sleep. However, as an avid water-drinker, I’m surprised at how often hydration is overlooked. Ample hydration is not only critical for overall health, but also plays a significant role in maintaining a healthy gut. Let’s explore the connection between hydration and gut health and why water intake matters.


The Importance of Hydration:

Water is essential for the proper functioning of virtually every body system, including digestion (and of course, your lymphatic system). It aids in the breakdown of food, absorption of nutrients, and elimination of waste. Without adequate water intake, our digestive system can become sluggish, leading to issues such as constipation, bloating or worse.


The Gut Microbiome:

The gut microbiome, often referred to as our "second brain," is a complex ecosystem of trillions of microorganisms that reside in our digestive tract. These microbes play a crucial role in various aspects of our health, including digestion, immune function, and even mood regulation (look for future blog posts about this topic). Maintaining a healthy balance of gut bacteria is essential for overall well-being.


How Hydration Impacts Gut Health:

  • Digestive Function: Drinking plenty of water helps keep the digestive system running smoothly; moving food through the digestive tract efficiently, preventing issues like constipation and promoting regular bowel movements.

  • Microbial Balance: Water is necessary for the growth and survival of beneficial gut bacteria. Dehydration can disrupt the balance of microbes in the gut, potentially leading to dysbiosis*, inflammation, and digestive problems.

  • Mucosal Integrity: The mucosal lining of the gut acts as a barrier, protecting against harmful pathogens and toxins. Proper hydration helps maintain the integrity of this barrier, reducing the risk of inflammation and leaky gut syndrome**.

  • Nutrient Absorption: Water plays a vital role in the absorption of nutrients from the digestive tract into the bloodstream. Without adequate hydration, nutrient absorption may be compromised, leading to deficiencies and other health issues.


Tips for Staying Hydrated:

  • Aim for at least 8-10 glasses of water/day, or ½ your body weight in ounces (EX: 150 lb person should be drinking 75 oz/day.)

  • Hydrate before, during, and after exercise to replace fluids lost through sweat.

  • Incorporate high water content foods into your diet, such as watermelon and broccoli

  • Avoid dehydrating beverages like alcohol, caffeinated drinks or high sugar content drinks

  • It’s been said that once you’re thirsty, you’re already dehydrated; stay ahead of it.


Hydration plays a critical role in supporting gut health and overall well-being. By ensuring adequate water intake, you can help maintain optimal digestive function, support a healthy gut microbiome, and promote overall health.


*Defined by an imbalance in bacterial composition, changes in bacterial metabolic activities, or changes in bacterial distribution within the gut.

**Micro-tears in your intestines — allowing bacteria and waste to seep into your body.

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