Many studies highlight the benefits of probiotics for helping to prevent or reduce constipation. But which particular probiotics should you choose?
Studied in detail for many years for its impact on general health and multiple diseases, the gut microbiota is one of the body’s key organs.
Composed of trillions of bacteria and as individually unique as a fingerprint, the microbiota is formed at a very early stage of development, from the first months of life, in order to achieve a symbiotic balance (1).
Problems arise when this balance is lost - when levels of certain bacteria become too low, and others too high. When such changes to the microbiota are the cause of digestive and extra-digestive diseases, it is referred to as dysbiosis.
Constipation is a gastrointestinal disorder characterised by difficulty passing stools, less frequent bowel movements or a feeling of incomplete emptying of the bowels. It can be due to a lack of fibre, fluid, physical activity, etc.
It is often accompanied by increased production of gas or bloating, caused in particular by a rise in bacterial fermentation.
To qualify as ‘chronic’, constipation must generally be present for several months.
Unsurprisingly, studies have shown that sufferers of chronic constipation often present with dysbiosis, ie, an imbalanced gut microbiota (2). But it’s hard to know which comes first!
Current scientific knowledge suggests the two have a mutually influencing effect, creating a cycle in which:
According to the World Health Organization (WHO), the term probiotics denotes dietary supplements that contain “live microorganisms which confer a health benefit on the host when consumed in adequate amounts” (3).
In fact, probiotics are composed of the same bacteria as those present in the microbiota. They are used for supporting the balance of the gut microbiota (4).
That’s why many studies have focused on evaluating the efficacy of probiotics, and certain strains in particular, in treating chronic constipation.
A 2017 meta-analysis, reviewing 9 randomised, placebo-controlled trials, suggests that probiotic administration significantly relieves constipation and bloating in older individuals (10%-40% of cases compared with control groups given a placebo).
The bacterial species most often tested was Bifidobacterium longum (which can be found in the supplement Bifidobacterium longum as well as in the formulation Colon Friendly where it is combined with other synergistic bacteria) (5).
Another meta-analysis, conducted in 2010, which examined 5 randomised, placebo-controlled trials involving almost 400 patients, highlights other probiotic species (6):
Caution should be exercised, however, when interpreting these reports because of the diverse nature of the studies, populations and risk of bias. All the researchers confirm the need for further placebo-controlled trials in order to identify strains, doses and optimal supplementation duration. Ultimately, however, most of the studies agree on the potential benefits of probiotics for constipation.
It’s also worth mentioning irritable bowel syndrome, which can cause constipation, diarrhoea or a combination of the two. This condition (which seems to be becoming increasingly prevalent over time, particularly among Western populations) has been a key interest in medicine for some time.
A meta-analysis from 2015, examining 15 clinical trials involving almost 1800 patients, points to beneficial effects from probiotics for this condition. It concludes that, compared with a placebo, probiotics reduce pain and symptom severity in IBS (7).
Another meta-analysis found that it was high-concentration multi-strain probiotics in particular, (such as Full Spectrum Probiotic Formula, which contains 20 strains powerfully-dosed at 36 billion CFU per day) which, by modulating the gut microbiota, may be effective in cases of IBS (8).
A meta-analysis from 2010 of 31 randomised, placebo-controlled trials involving over 5000 patients suggests that the yeast Saccharomyces boulardiioffers therapeutic efficacy in preventing diarrhoea induced by antibiotics, as well as significant potential in treating IBS in general (and thus its associated symptoms such as constipation) (9).
This probiotic is also available in dietary supplement form (see Saccharomyces Boulardii).
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