I take L Carnitine for weight loss, it says not to take more then 1g per day, but I read online that i should have 2 4g per day to lose weight. What is Long Term Changes in Gut Microbial Metabolite Trimethylamine N Oxide and Coronary Heart Disease Risk JACC L Carnitine intake and high trimethylamine N oxide plasma levels correlate with low aortic lesions in ApoE transgenic mice expressing CETP Atherosclerosis Study reveals how red meat harms the heart. A species of gut bacteria, more abundant in red meat eaters, is key in turning a dietary nutrient called carnitine into TMAO which promotes blood clotting Dietary allicin reduces transformation of L carnitine to TMAO through impact on gut microbiota ScienceDirect