Evidence supporting the use of: Bifidobacteria (unspecified)
For the health condition: Infection (viral)

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Synopsis

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

Bifidobacteria, a genus of probiotic bacteria commonly found in the human gut, have been studied for their role in modulating the immune system and potentially supporting the body’s response to viral infections. Several in vitro and animal studies have demonstrated that certain Bifidobacteria strains can enhance immune function by increasing the production of antiviral cytokines (such as interferon-gamma) and supporting the activity of natural killer (NK) cells. Some human clinical trials have evaluated the use of Bifidobacteria-containing probiotics in preventing or reducing the duration of viral upper respiratory tract infections, especially in children and the elderly. Meta-analyses suggest a modest benefit in reducing the incidence and severity of common viral infections (e.g., colds, influenza-like illness), though results are variable and often strain-specific.

Despite these findings, most studies use mixed probiotic formulations rather than Bifidobacteria alone, and the effects are not consistently strong across all populations. There is limited direct evidence supporting the use of unspecified Bifidobacteria strains for the treatment or prevention of viral infections in humans, and the quality of evidence is generally low to moderate. Therefore, while there is some scientific basis for the use of Bifidobacteria to support immune health and potentially reduce susceptibility to viral infections, the evidence is not robust enough to recommend their use as a primary or sole treatment for viral infections.

More about Bifidobacteria (unspecified)
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