Carnitine Deficiency: What Is It, Causes, Symptoms, and More Osmosis 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 Carnitine metabolism in hypertensive heart failure Hypertension Research L Carnitine with Chromium Wycoff Wellness Linear association of 10 year changes in L carnitine levels with the Download Scientific Diagram The Role of L Carnitine in Kidney Disease and Related Metabolic Dysfunctions