L Carnitine for Cats: Why Energy Drops, How Fat Metabolism Stalls, and How to Protect Heart Function La Petite Labs TCfeline Special Formula Premix Feline Future Cat Food Company Renal diets why they're important! It's really important for cats diagnosed with chronic kidney disease (CKD) to eat a diet that has been recommended by their veterinary team and is 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 My 4 month old girl Margo was diagnosed with polyneuropathy last week. Neurologist has recommended L carnitine as a supplement. She's better than she was but not climbing or jumping yet x