L carnitine: Science Backed Benefits, Risks, and More Did you know L Carnitine is also in food, mainly from red meat. However, if you're mainly eating white meat, fruits and veggies, you might not be getting enough. Swipe left to see Intestinal microbiota metabolism of l carnitine, a nutrient in red meat, promotes atherosclerosis Nature Medicine Meat metabolizing bacteria in atherosclerosis Nature Medicine Contents of l carnitine and taurine in meat and animal origin products. Download Scientific Diagram