Identification of TMAO producer phenotype and hostdietgut dysbiosis by carnitine challenge test in human and germ free mice Gut Characterization of TMAO productivity from carnitine challenge facilitates personalized nutrition and microbiome signatures discovery Microbiome Springer Nature Link TMAO: Why It Increases & Factors That May Reduce TMAO levels SelfDecode Labs Identification of TMAO producer phenotype and hostdietgut dysbiosis by carnitine challenge test in human and germ free mice Gut