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The gut microbiota interacts with the host’s immune function, and evidence supports a relationship between the gut microbiota and age-related disease. Consumption of herbs and spices, which contain bioactive compounds such as polyphenols, is associated with gut microbiota characteristics that may act to prevent or manage age-related declines in health. This review evaluates the evidence describing the effect of herb/spice intake on the gut microbiota and health during aging. Commonly consumed herbs/spices, their impact on prominent gut bacteria phyla (Bacteriodetes, Firmicutes), and diseases of aging are highlighted. Studies in humans and animals are reviewed. Mechanisms of action are discussed, and future directions for research are proposed. Dietary enrichment with herbs and spices is a potential novel intervention for mitigating declines in physiological function with age.
Pradhan et al. (Wed,) studied this question.