Identification of TMAO producer phenotype and hostdietgut dysbiosis by carnitine challenge test in human and germ free mice Gut Frontiers The gut microbial metabolite trimethylamine N oxide and cardiovascular diseases Characterization of TMAO productivity from carnitine challenge facilitates personalized nutrition and microbiome signatures discovery Microbiome Springer Nature Link TMAO and Heart Disease A Serious Heart Marker Functional Medicine University The Leader in Online Training in Functional Diagnostic Medicine