Supplements to Support Your Dog or Cat's Heart Animal Wellness Magazine Hill's Prescription Diet w d Multi Benefit Weight GI & Glucose Mana My Animal Dispensary 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 Invicarn Sava Vet A Beginner's Guide to L Carnitine Wonder Paws