New study links L carnitine in red meat to heart disease Harvard Health 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 Parker Naturals L Carnitine 5000 Mg Premium Dietary Supplement Liquid Parker Naturals L Carnitine 3,000mg by EC Sports Supreme Nutrition