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"There are no large-scale human trials

Weber said his patients have relayed positive anecdotes regarding peptide use -- but cautioned such anecdotes are not enough to guide use more broadly, without deeper research

Furthermore, A healthy symbiotic microbiota effectively inhibits the overgrowth and colonization of foreign pathogens or endogenous opportunistic pathogens by occupying ecological sites (spatial competition), consuming limited nutrients (nutritional competition), and creating an environment that is unfavorable for pathogen growth (such as reducing pH through acid production)

Kondo M, Nakamura Y, Ishida Y, Shimada S