Faced with temporary constipation, some people spontaneously turn to baking soda dissolved in a glass of water. This versatile product, known for its culinary or household uses, is sometimes seen as a simple way to relieve digestive discomfort.
But before you adopt this method, it helps to understand what bicarbonate actually does in the digestive system. But also under what conditions it can bring a slight improvement or on the contrary risk worsening the symptoms.
What is baking soda or sodium?
“Baking soda and sodium bicarbonate refer to exactly the same chemical substance (NaHCO₃), obtained by the Solvay process from salt, chalk and ammonia, with only differences in purity between the food grade intended for ingestion and the household or technical grade reserved for domestic uses. first defines Dr Gérald Kierzek, emergency doctor and medical director of True Medical.
“For any internal use, it is essential to choose exclusively the food grade version, because the household product is less pure and can be abrasive” he recalls again.
Is it effective against constipation?
According to our expert, it is possible to use it for this purpose, occasionally.
“Sodium bicarbonate may occasionally relieve mild constipation by modestly increasing intestinal hydration and promoting gastric motility through neutralization of acidity.” explains Dr. Kierzek.
But don’t expect miracles. “However, its effectiveness remains anecdotal, not robustly demonstrated, and significantly lower than that of osmotic laxatives or fibers, which requires it to be used with caution.“.
How can bicarbonate act on constipation? “In the stomach, this powder releases CO₂ upon contact with gastric acid. This reaction can speed up emptying of the stomach and slightly hydrate the stools, but it also leads to bloating, reactive diarrhea or rebound acidity, without treating the root cause of constipation.” warns the doctor.
When and how to use it, and in what cases to avoid?
“The commonly mentioned dosage consists of dissolving half to a teaspoon in approximately 200 ml of lukewarm water, up to one to three times a day on an empty stomach.” evokes the specialist. But be careful because despite its apparent simplicity, this method is not suitable for everyone.
“The composition rich in sodium raises several contraindications: renal or heart failure, hypertension, pregnancy or low-sodium diet. In these situations, bicarbonate may cause alkalosis, edema, nausea, or other metabolic imbalances.”
he recalls.
This drink should therefore not be used repeatedly or for a prolonged period, and even less so as an alternative to a consultation, especially in cases of pain, persistent symptoms or frequent episodes of constipation.
The most reliable solutions to regain regular transit
Even if bicarbonate can provide temporary relief, recognized methods remain safer for lastingly improving transit. They act deeply and limit the uncomfortable reactions observed with improvised remedies.
Dr Gérald Kierzek therefore recommends:
- Gradually increase dietary fiber;
- Drink enough throughout the day;
- Maintain regular physical activity;
- Respect the natural evacuation reflex;
- Use an osmotic laxative if occasionally needed.
“And of course, consult a doctor if symptoms become chronic or bothersome.” he concludes.