Urolithin, intestinal microbiota metabolites of ellagitannin-rich foods, exhibit anti-aging activities. However, urolithin A is significantly superior to other types of urolithin with regard to this anti-aging function. This study aimed to screen edible urolithin A-producing strains of bacteria and explore the corresponding anti-aging efficacy of fermented products produced by these strains using as a model. Our results showed that the strains CCFM1286, CCFM1290, and CCFM1291 converted ellagitannin to produce urolithin A; the corresponding yields of urolithin A from these strains were 15.90 ± 1.46, 24.70 ± 0.82, and 32.01 ± 0.97 μM, respectively. Furthermore, it was found that the pomegranate juice extracts fermented by the CCFM1286, CCFM1290, and CCFM1291 strains of could extend lifespan by 26.04 ± 0.12, 32.05 ± 0.14, and 46.33 ± 0.12%, respectively, by improving mitochondrial function and/or reducing reactive oxygen species levels. These findings highlight the potential application of this fermentation in the subsequent development of anti-aging products.
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