L Carnitine intake and high trimethylamine N oxide plasma levels correlate with low aortic lesions in ApoE transgenic mice expressing CETP Atherosclerosis L Carnitine Male Enhancement: What the Evidence Shows for Energy, Sperm Health, and Performance 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 JCI l Carnitine in omnivorous diets induces an atherogenic gut microbial pathway in humans