Synopsis

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

Probiotics have been investigated for their potential role in supporting or treating rhinitis, particularly allergic rhinitis. The rationale is based on the concept that probiotics can modulate the immune system and influence the balance between Th1 and Th2 immune responses, which are implicated in allergic conditions like rhinitis. Several randomized controlled trials and meta-analyses have explored the effects of various probiotic strains (such as Lactobacillus and Bifidobacterium) on symptoms of allergic rhinitis. Some studies report modest improvements in nasal symptoms and quality of life, possibly due to anti-inflammatory effects and regulation of immune responses. However, results are inconsistent, with other trials finding minimal or no significant benefit compared to placebo. Meta-analyses generally conclude that while probiotics may have a small beneficial effect, the evidence is limited by heterogeneity in probiotic strains, dosages, and study designs.

There is no strong traditional basis for the use of probiotics in rhinitis; the interest is largely recent and based on evolving understanding of the gut-immune axis. Overall, the scientific evidence supports a possible but modest benefit, and probiotics are not considered a primary or standalone treatment for rhinitis. Their use is generally regarded as adjunctive and may be more relevant in individuals seeking non-pharmacological interventions with a favorable safety profile.

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