Pathobiological Relationship of Excessive Dietary Intake of Choline L Carnitine: A TMAO Precursor Associated Aggravation in Heart Failure in Sarcopenic Patients Gut Microbiome Derived Metabolite Trimethylamine N Oxide Induces Aortic Stiffening and Increases Systolic Blood Pressure With Aging in Mice and Humans Hypertension Simultaneous quantification of trimethylamine oxide and its precursors from gut microbial metabolic pathway Comparison of short term and long term effects of peroral L carnitine intake: clinical implications of elevated TMAO levels in cardiovascular complications