Did you know that the choice of water you drink can directly influence your intestinal comfort? From constipation, bloating, or irritable bowel syndrome, finding the right water for your digestion can make all the difference. But how do you navigate all these choices: magnesium-rich water, bicarbonate, sulfate, or low-mineral water?
In this guide, we review the most beneficial types of water for your intestines, with a practical ranking, personalized advice according to your digestive needs, and tips for maintaining regular bowel movements.
Why does water play a key role in intestinal health?
Water helps maintain optimal digestive balance by facilitating the passage of food through the digestive tract, supporting nutrient absorption, and aiding in waste elimination. Insufficient hydration can slow these mechanisms and lead to digestive disorders such as constipation or bloating.
Good hydration for good transit
Your digestive system needs water to function properly. When you drink enough, stools remain soft and are easier to pass. A study published in BMC Public Health confirms that sufficient hydration significantly reduces the risk of constipation in adults.
Specifically, water increases the volume of your intestinal contents and facilitates their movement through the colon. Conversely, insufficient hydration slows intestinal transit. The colon then absorbs more water from the stools, which become harder and more difficult to pass.
The link between water, gut flora, and digestion
Water plays an indirect but important role in the gut microbiota. It hydrates dietary fibers and promotes their fermentation by intestinal bacteria. This process leads to the production of short-chain fatty acids, essential for the health of the colonic mucosa. A lack of hydration can alter the conditions necessary for this fermentative activity.
Water also helps maintain an environment favorable to the action of digestive enzymes and facilitates the absorption of nutrients through the intestinal wall.
Different types of water and their effects on the intestines
Not all waters are equal when it comes to digestion. Their mineral composition can influence your intestinal transit, digestive comfort, and intestinal tolerance.
Magnesium-rich waters
Magnesium-rich mineral waters are known for their beneficial effect on intestinal transit. Thanks to its osmotic effect, magnesium retains water in the intestine and helps soften stools. This is why they are often recommended in cases of occasional constipation. However, consumed in excess, they can have an overly pronounced laxative effect in some people.
Bicarbonated waters
Bicarbonate-rich waters help neutralize gastric acidity and improve digestion, especially after heavy meals. They can relieve feelings of heaviness, bloating, and promote better digestive comfort. Their action is primarily beneficial for the stomach, but it also has a positive impact on the entire digestive process.
Low-mineral waters
Low-mineral waters are generally well tolerated by sensitive intestines. Mont Roucous, Volvic, or Evian belong to this category. With a dry residue of less than 500 mg per liter, they effectively hydrate without a specific effect on transit. This is why they are suitable for people prone to digestive disorders and for daily consumption.
Sulfate-rich waters
Sulfate-rich mineral waters have a stimulating effect on intestinal transit. They promote bile secretion and intestinal activity, which can help with constipation. However, in some people, they can cause bloating or digestive discomfort if consumed in large quantities.
By adapting the type of water you consume to your digestive sensitivity and needs, you can improve your daily intestinal comfort.
Which water to choose according to your intestinal problems?
The choice of water can have a real impact on digestive comfort. Depending on your intestinal problems, some waters will be more suitable than others, thanks to their mineral composition.
In case of constipation
You should favor magnesium-rich or sulfate-rich waters. Several studies have shown that a daily consumption of about 1 liter of Hépar or Contrex, distributed throughout the day, improves stool consistency and frequency. Supplement with low-mineral water. If constipation persists after one week, consult a doctor immediately.
In case of irritable bowel syndrome (IBS)
A pilot clinical study showed that consuming ionized alkaline water could improve certain symptoms in patients with diarrhea-predominant IBS. However, these results remain limited and only concern a subgroup of patients.
In practice, opt for low-mineral waters. Generally better tolerated by sensitive intestines, they allow for good hydration without excessively stimulating transit or causing bloating. Avoid mineral waters very rich in magnesium, which can worsen some IBS symptoms.
In case of diarrhea or intestinal imbalance
Still, low-mineral water is your ally in case of diarrhea. You can add a pinch of salt and a spoonful of sugar per liter to compensate for losses and avoid dehydration.
Drink in small sips every 10 minutes rather than large glasses at once. This method reduces nausea and promotes gradual rehydration. If diarrhea persists for more than 48 hours, consult a doctor quickly. Absolutely avoid Hépar, Contrex, or any magnesium-rich water, which would worsen the situation.
Summary table — which water for which intestinal problems?
Adapting your water choice to your digestive problems can help improve your daily intestinal comfort, in addition to a balanced diet and a healthy lifestyle.
|
Type of Intestinal Problem |
Recommended Water / Water Type |
Main Benefits |
|
Functional Constipation |
Magnesium and sulfate-rich waters (Hépar, Vittel, Contrex, Saint-Antonin, Rozana) |
Stimulates transit, mild to moderate laxative effect. Improves stool frequency and consistency. |
|
Slow Digestion / Digestive Discomfort |
Bicarbonate-rich waters >600 mg/L (Vichy Célestins, Badoit) |
Promote digestion, reduce gastric acidity, and improve comfort after meals. |
|
Irritable Bowel Syndrome (IBS) or Sensitive Bowel |
Low-mineral waters (Volvic, Évian, Mont Roucous) |
Well-tolerated, hydrates without excessive transit stimulation. |
|
Diarrhea / Temporary Intestinal Imbalance |
Low-mineral waters (Volvic, Évian, Mont Roucous) or filtered tap water |
Hydrates without irritating the intestine, limits excess minerals that could accelerate transit. |
Practical tips for improving intestinal comfort
Improving intestinal comfort is not just about one action: it involves adopting several simple and effective daily habits. Here are some recommendations to adopt:
Adjust your diet
Gradually increase your fiber intake if you are constipated, by consuming more fruits and vegetables (prunes, apples, carrots, broccoli) as well as whole grains (oats, quinoa, brown rice). Ideally, seek advice from a dietitian-nutritionist. Fibers help soften stools and stimulate intestinal transit.
Drink enough water
Hydration is also essential: drink about 1.5 to 2 liters of water per day, distributed throughout the day. This quantity may vary depending on your weight, physical activity, outdoor temperature, and health status. To consume more, you can flavor your water with a slice of lemon or a few fresh mint leaves.
Exercise regularly
Walk at least 30 minutes a day. Walking stimulates intestinal peristalsis through pelvic movements. Cycling, swimming, or gentle exercises also work.
Adopt good daily habits
Take your time eating, chew slowly, maintain a regular meal rhythm, and do not hold back your urge to go to the toilet. To support gut flora, favor food probiotics like plain yogurt or kefir and limit irritating foods such as coffee, alcohol, carbonated, or very sweet drinks.
By combining these actions, you can prevent constipation, reduce bloating, and promote efficient digestion every day.
FAQ – Frequently asked questions about water and intestines
Which water to drink for good transit?
To stimulate intestinal transit, it is recommended to consume magnesium and sulfate-rich waters, such as Hépar, Vittel, or Contrex. These minerals create an osmotic effect that retains water in the stools, softens them, and facilitates their evacuation. Regular hydration, throughout the day, is essential for effective transit.
Which water to drink when you have an irritable bowel?
In case of irritable bowel syndrome (IBS), it is better to choose low-mineral waters, such as Volvic, Évian, or Mont Roucous. They are gentle on the intestine, do not stimulate transit, and limit the risk of bloating or digestive discomfort.
Does sparkling water help digestion?
Sparkling water can sometimes help digestion, as the bubbles can promote a feeling of digestion and relieve heaviness after meals. Be careful, however, if you have a sensitive intestine.
Should you change your water regularly?
Varying waters can be beneficial to balance mineral intake and avoid an overload of certain elements (magnesium, calcium, sulfates, bicarbonates). However, it is not essential to change water every day: the important thing is to stay well hydrated and choose water adapted to your digestive needs.
Bibliography
Wang, D.-C., Peng, X.-F., Chen, W.-X., & Yu, M. (2025). The association of moisture intake and constipation among US adults: Evidence from NHANES 2005–2010. BMC Public Health, 25, Article 399. https://doi.org/10.1186/s12889-025-21346-x
Dupont, C., & Hébert, G. (2020). Magnesium sulfate‑rich natural mineral waters in the treatment of functional constipation – A review. Nutrients, 12(7), 2052. https://doi.org/10.3390/nu12072052
Mansouri, K., Hanh, T., & Hahn, A. (2025). Hydration Meets Regulation: Insights into Bicarbonate Mineral Water and Acid–Base Balance. Nutrients, 17(14), 2291. https://doi.org/10.3390/nu17142291
Vitali, M., Fontana, M., De Giorgi, A., Marotta, D., Crucianelli, S., Antonucci, A., & Protano, C. (2023). Natural mineral water and diuresis: A systematic review. International Journal of Environmental Research and Public Health, 20(8), 5527. https://doi.org/10.3390/ijerph20085527
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