Non lethal Inhibition of Gut Microbial Trimethylamine Production for the Treatment of Atherosclerosis: Cell Dietary supplementation of l carnitine ameliorates metabolic syndrome independent of trimethylamine N oxide produced by gut microbes in high fat diet induced obese mice Food & Function (RSC Publishing) Identification of TMAO producer phenotype and hostdietgut dysbiosis by carnitine challenge test in human and germ free mice Gut Identification of TMAO producer phenotype and hostdietgut dysbiosis by carnitine challenge test in human and germ free mice Gut Cheap protein = expensive gut problems. Here's what to look for on the label before you buy