Evidence supporting the use of: Bifidobacterium bifidum
For the health condition: Rhinitis

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Synopsis

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

Bifidobacterium bifidum is a probiotic strain that has been investigated for its potential to support immune function and reduce allergic responses, including those seen in rhinitis. Scientific interest in probiotics for allergic rhinitis (AR) comes from their role in modulating the gut microbiota and influencing the immune system, especially the balance between Th1 and Th2 immune responses, which are central to allergy development.

Some clinical studies have examined the effects of B. bifidum-containing probiotic supplements in patients with allergic rhinitis. For example, a randomized, double-blind, placebo-controlled trial published in 2013 evaluated the effects of B. bifidum in children with seasonal allergic rhinitis and found some improvements in quality of life and nasal symptoms, though results were not uniformly strong across all endpoints. Other studies with probiotic blends including B. bifidum have suggested mild benefits in symptom reduction and immunomodulation, but often the effect sizes are modest, and studies are frequently small or combined with other probiotic strains, making it difficult to isolate the effect of B. bifidum alone.

Overall, while there is preliminary scientific evidence suggesting B. bifidum may provide some benefit for allergic rhinitis, the quality and consistency of evidence is low to moderate. Larger, high-quality trials are needed to confirm efficacy. Thus, its use is supported more by emerging science than by longstanding tradition or robust clinical endorsement.

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