L Carnitine vs Pre Workout: Which Supplement Should You Take? The Microbial Metabolite Trimethylamine N Oxide Links Vascular Dysfunctions and the Autoimmune Disease Rheumatoid Arthritis How L Carnitine Supports Weight Loss During Intermittent Fasting Dietary allicin reduces transformation of L carnitine to TMAO through impact on gut microbiota ScienceDirect Trimethylamine N oxide (TMAO) is a small molecule produced in humans primarily by the gut liver axis and has become an important biomarker, and possible mediator, of cardiometabolic and renal disease. Dietary choline, phosphatidylcholine ( L Carnitine: Benefits, Side Effects, FAQ, Sources, and Dosage