Evidence supporting the use of: Bifidobacterium
For the body system: Peyer’s patches

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Table of Contents

Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Bifidobacterium (unspecified species) is supported by scientific evidence for its role in modulating the immune system, including effects on Peyer’s patches, which are key components of the gut-associated lymphoid tissue (GALT). Peyer’s patches are clusters of lymphoid follicles in the small intestine that play a critical role in immune surveillance and the generation of immune responses to antigens in the gut. Several animal and in vitro studies have demonstrated that Bifidobacterium species can influence the activity and development of Peyer’s patches. For example, Bifidobacterium supplementation has been shown to enhance IgA production, increase the number of immune cells (such as dendritic cells and T cells) within Peyer’s patches, and stimulate local cytokine production. These effects are thought to contribute to improved gut barrier function and heightened mucosal immunity. In humans, most evidence is indirect, focusing on immune-related outcomes such as increased secretory IgA levels and improved resistance to gastrointestinal infections. However, specific studies directly linking Bifidobacterium supplementation to functional changes in human Peyer’s patches are limited. Thus, while there is a mechanistic basis and supportive preclinical data, the overall clinical evidence in humans is moderate. The use of Bifidobacterium to support Peyer’s patches and broader mucosal immunity is therefore scientifically grounded but would benefit from more targeted human trials.

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