Synopsis

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

Lactobacillus bulgaricus is a probiotic bacterium commonly used in the fermentation of yogurt and other dairy products. Its use in supporting or treating Irritable Bowel Syndrome (IBS) is primarily based on the broader scientific interest in probiotics for gastrointestinal health. Several clinical studies have explored the role of probiotics in alleviating IBS symptoms such as bloating, abdominal pain, and irregular bowel movements. However, most of the evidence centers on multi-strain probiotic preparations or other specific strains (such as Lactobacillus plantarum or Bifidobacterium infantis), rather than L. bulgaricus alone.

There is some scientific rationale for the use of L. bulgaricus in IBS: it may help restore the balance of gut microbiota, improve intestinal barrier function, and modulate immune responses. Some small studies and reviews have found that yogurts containing L. bulgaricus and Streptococcus thermophilus can improve certain gastrointestinal symptoms. However, the evidence is mixed and often not specific to IBS or to L. bulgaricus as a single agent. Major clinical guidelines do not specifically recommend L. bulgaricus for IBS, but suggest that some probiotics may offer symptom relief for some patients.

In summary, while there is a scientific basis and some preliminary evidence supporting the use of Lactobacillus bulgaricus for IBS, it is not robust or specific enough to warrant a strong recommendation. The evidence is rated as low to moderate (2 out of 5).

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