L Carnitine intake and high trimethylamine N oxide plasma levels correlate with low aortic lesions in ApoE transgenic mice expressing CETP ScienceDirect L Carnitine Linus Pauling Institute Oregon State University L Carnitine: Benefits, Uses, and Side Effects Lifespan Research Institute Cleveland Clinic researchers have discovered a connection between elevated blood levels of TMAO (trimethylamine N oxide)a byproduct of gut bacteria digestion of nutrients found in red meat and other animal productsand a higher Metabolite acetyl L carnitine participates in Bifidobacterium animalis F1 7 to ameliorate atherosclerotic inflammation by downregulating theTLR4 NF B pathway ScienceDirect