Characterization of TMAO productivity from carnitine challenge facilitates personalized nutrition and microbiome signatures discovery Microbiome Springer Nature Link Cheap protein = expensive gut problems. Here's what to look for on the label before you buy Identification of TMAO producer phenotype and hostdietgut dysbiosis by carnitine challenge test in human and germ free mice Gut Linking anaerobic gut bacteria and cardiovascular disease Nature Microbiology