Loyall Life Large Breed Beef & Barley Recipe Carnitine: the claims and why it may not work L Carnitine Pure Powder, 3 oz (85 g) L Carnitine 3500 Metabolic Nutrition 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 Taking a Closer Look at TMAO Dr. Radoff