Full article: Gut microbes with the gbu genes determine TMAO production from L carnitine intake and serve as a biomarker for precision nutrition Association between red meat consumption and the risk of cardiovascular disease: An important role of L carnitine metabolites Prevention Observatory of the Montreal Heart Institute Dietary allicin reduces transformation of L carnitine to TMAO through impact on gut microbiota ScienceDirect Characterization of TMAO productivity from carnitine challenge facilitates personalized nutrition and microbiome signatures discovery Microbiome Springer Nature Link Comparison of short term and long term effects of peroral L carnitine intake: clinical implications of elevated TMAO levels in cardiovascular complications TMAO (Trimethylamine oxide) biocrates life science