Numerous studies have shown that (poly)phenols can alter the composition of the gut microbiota by promoting the growth of beneficial bacteria and inhibiting the proliferation of pathogenic species. These interactions may lead to changes in microbial alpha diversity. Our study results show a modest yet statistically significant increase in alpha diversity at the order level, with the Simpson index rising by 0.007 and the Shannon index by 0.020. In general, studies on animal models investigating the effects of (poly)phenols on gut microbiota have been inconclusive, with some observing a significant impact, while others did not. These variations may depend on the specific structure and dosage of the (poly)phenols used.