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A commensal relationship is an organism-to-organism relationship in which one species benefits from the presence of another species in terms of food or other benefits without harming or benefiting the other (J Hellmann, 2013). Commensal bacteria are an example of a commensal relationship between the host (i.e., human) and bacteria.
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The Center for Nutritional Psychology
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The Center for Nutritional Psychology. (2026). Commensal Relationship. In Encyclopedia of Nutritional Psychology. The Center for Nutritional Psychology.
https://www.nutritional-psychology.org/encyclopedia/commensal-relationship/
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