Intestinal microbiota metabolism of l carnitine, a nutrient in red meat, promotes atherosclerosis Nature Medicine Identification of TMAO producer phenotype and hostdietgut dysbiosis by carnitine challenge test in human and germ free mice Gut TMAO: how gut microbiota contributes to heart failure Translational Research Cheap protein = expensive gut problems. Here's what to look for on the label before you buy Trimethylamine Oxide Metabolon Identification of TMAO producer phenotype and hostdietgut dysbiosis by carnitine challenge test in human and germ free mice Gut