AUTHOR=Liu Kailong , Yao Guoqiang , Yang Zhan , Huang Tian , Kwok Lai-Yu , Zhang Heping TITLE=Untargeted metabolomic analysis uncovers metabolic variability of four Bifidobacterial strains for probiotic development JOURNAL=Frontiers in Microbiology VOLUME=16 YEAR=2025 URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2025.1522036 DOI=10.3389/fmicb.2025.1522036 ISSN=1664-302X