L Carnitine Deficiency in Cats PetMD What science says about L carnitine and Choline for cats Stylla TCfeline Special Formula Premix Feline Future Cat Food Company L Carnitine Deficiency in Cats PetMD Supplements to Support Your Dog or Cat's Heart Animal Wellness Magazine 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