Fig. 3
From: Probiotic fermentation of polyphenols: potential sources of novel functional foods

Influence of food polyphenols on microbial population. Polyphenols suppress the growth of opportunistic pathogens that ultimately allows for the proliferation of probiotic bacteria. In addition, polyphenols may directly augment the growth of probiotic bacteria while still suppressing pathogenic growth thereby favorably reshaping the microbial community structure of foods