This meta-analysis synthesized 29 RCTs (n = 1,633; ≥60 years) to evaluate how probiotics, prebiotics, and synbiotics (PPS) affect gut microbiota, S
This large-scale prospective cohort study used NHANES 1999–2018 data (n = 53,333) to assess how nonfood prebiotics, probiotics, and synbiotics affe