Synopsis

Source of validity: Scientific
Rating (out of 5): 2

Streptococcus thermophilus is a probiotic bacterium commonly used in the fermentation of dairy products. Its use in supporting or treating Irritable Bowel Syndrome (IBS) is primarily justified by emerging scientific evidence, although the overall quality and quantity of supporting studies remain limited, hence the evidence rating of 2 out of 5.

Some clinical research has evaluated the effects of probiotics containing S. thermophilus (often in combination with other strains, such as Lactobacillus and Bifidobacterium species) on IBS symptoms. A few randomized controlled trials and meta-analyses suggest that multi-strain probiotics, which include S. thermophilus, can help reduce symptoms such as bloating, abdominal pain, and irregular bowel habits in IBS patients. However, it is important to note that S. thermophilus is rarely studied in isolation for IBS; most research examines its impact as part of a probiotic blend.

The proposed mechanisms by which S. thermophilus may benefit IBS include modulation of the gut microbiota, enhancement of mucosal barrier function, and reduction of inflammatory responses in the gut. Despite these promising mechanisms, direct evidence for S. thermophilus alone is sparse, and more robust, strain-specific studies are needed to confirm its efficacy.

In summary, while there is some scientific rationale and preliminary research supporting the inclusion of S. thermophilus in probiotic supplements for IBS, the evidence is not strong or specific enough to make definitive clinical recommendations for its use as a stand-alone treatment.

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