TMAO and Heart Disease A Serious Heart Marker Functional Medicine University The Leader in Online Training in Functional Diagnostic Medicine 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 Frontiers The gut microbial metabolite trimethylamine N oxide and cardiovascular diseases Pathobiological Relationship of Excessive Dietary Intake of Choline L Carnitine: A TMAO Precursor Associated Aggravation in Heart Failure in Sarcopenic Patients