Renal function is associated with plasma trimethylamine N oxide, choline, l carnitine and betaine: a pilot study International Urology and Nephrology Springer Nature Link L Carnitine intake and high trimethylamine N oxide plasma levels correlate with low aortic lesions in ApoE transgenic mice expressing CETP Atherosclerosis Mitochondrial control of fuel switching via carnitine biosynthesis Science Identification of TMAO producer phenotype and hostdietgut dysbiosis by carnitine challenge test in human and germ free mice Gut