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 Dietary l Carnitine Supplementation in Obese Cats Alters Carnitine Metabolism and Decreases Ketosis during Fasting and Induced Hepatic Lipidosis ScienceDirect A Beginner's Guide to L Carnitine Wonder Paws TCfeline Special Formula Premix Feline Future Cat Food Company Hill's Prescription Diet w d Multi Benefit Weight GI & Glucose Mana My Animal Dispensary