By helping to support the balance of the intestinal microbiota, could certain probiotics have an impact on the quality of life of irritable bowel sufferers? Here's what the research says.
Irritable bowel syndrome (IBS), also known as functional colopathy, is a common chronic disorder of the digestive system.
It is characterised by recurrent stomach aches or abdominal discomfort, associated with intestinal transit disorders: diarrhoea, constipation, or alternating periods of both.
Unlike chronic inflammatory bowel disease (IBD), IBS does not cause visible damage to the intestinal mucosa.
This can make diagnosis difficult and frustrating for patients, who may feel misunderstood and misjudged.
The symptoms of IBS vary from person to person, but they all have one thing in common: a major impact on quality of life.
Frequent bloating, a feeling of disturbed digestion, persistent discomfort, fatigue, and food anxiety can quickly interfere with the daily, social, and even professional lives of sufferers (1).
The intestinal microbiota represents all the living microorganisms that inhabit the intestines.
According to current scientific knowledge, it fulfils a variety of functions and contributes to several physiological processes, particularly those related to digestion and the immune system.
Clinical studies have revealed an alteration in the microbial balance of the intestines (dysbiosis) in people suffering from IBS.
Research suggests that the microbiota may contribute to the onset or worsening of digestive symptoms associated with IBS (2).
Maintaining or restoring a healthy balance in the microbiota could therefore be a promising way to better manage the condition.
According to the WHO, probiotics are live microorganisms which, when administered in adequate quantities, confer a health benefit on the host.
Several clinical studies have therefore examined the effect of probiotics (which make up the intestinal microbiota) on digestive disorders linked to IBS.
For example, one clinical review concluded that the use of certain probiotic species would be effective in relieving abdominal pain due to flatulence (particularly its frequency and intensity), bloating, digestive disorders and intestinal urgency.
The same review notes that these probiotics have also been shown to be beneficial in patients suffering from IBS, slowing down intestinal transit, reducing the average number of stools per day, improving stool consistency and, above all, improving patients' quality of life (3).
Biologically speaking, probiotics may act through several complementary mechanisms on these parameters (4):
These mechanisms could help restore intestinal balance, promoting better digestive comfort.
Probiotics are divided into different large 'families': lactobacilli, bifidobacteria, lactococci, streptococci and Saccharomyces-type yeasts.
They do not all have the same characteristics and therefore do not have the same effects when present in sufficient quantities in the colon.
This is why a meta-analysis looked at the species likely to show potential efficacy in acting specifically on manifestations of irritable bowel syndrome (5).
According to this study, the most interesting species in this context include certain types of:
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Some formulas combine several species of probiotics that contribute to the balance of the intestinal microbiota to offer a targeted effect on the colon.
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Apart from probiotics, other ingredients can also have interesting effects on patients suffering from irritable bowel syndrome.
For example, blond psyllium (Plantago ovata) is a soluble fibre that may be useful for regulating transit and softening stools by attracting water.
What's more, when it comes into contact with water, its mucilage forms a viscous gel that lines the intestinal walls and 'lubricates' them (6).
It is therefore often recommended in cases of IBS.
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Butyrate is a short-chain fatty acid produced by certain bacteria in the intestinal microbiota.
In particular, it helps to strengthen the intestinal barrier by tightening the junctions between the cells that make it up. It is also thought to help regulate inflammation and the balance of the microbiota (7).
All these parameters are of particular interest to IBS sufferers.
Discover the Butyrate Colon Formula food supplement, which contains an optimised form of butyrate (tributyrin) as well as other compounds studied in the context of IBS.
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