TCfeline Special Formula Premix Feline Future Cat Food Company Dietary l Carnitine Supplementation in Obese Cats Alters Carnitine Metabolism and Decreases Ketosis during Fasting and Induced Hepatic Lipidosis ScienceDirect L carnitine is primarily synthesized in the liver from the amino acids lysine and methionine through a series of four enzymatic reactions, with the liver and kidneys converting the precursor butyrobetaine into active A Beginner's Guide to L Carnitine Wonder Paws Role of carnitine in disease Nutrition & Metabolism Springer Nature Link Hill's m d GlucoSupport: Nutrition for Diabetic & Overweight Cats