Acetyl L Carnitine 500 mg Supplement Energy, Cognitive Support Acetyl L Carnitine for Heart, Diabetes & Kidney Health Kidney Coach Acetyl L Carnitine by Thorne METHODS AIM OF THE STUDY BACKGROUND RESULTS CONCLUSIONS 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 Acetyl L Carnitine (ALCAR) Supplement for Horses Mad Barn