Non lethal Inhibition of Gut Microbial Trimethylamine Production for the Treatment of Atherosclerosis: Cell Identification of TMAO producer phenotype and hostdietgut dysbiosis by carnitine challenge test in human and germ free mice Gut 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) Cheap protein = expensive gut problems. Here's what to look for on the label before you buy