L Carnitine: Benefits, Uses, Side Effects, and More Pure Encapsulations Acetyl l Carnitine 60 Caps Pure Integrative Pharmacy From the Literature Circulation Acetyl L Carnitine 500 mg Cognitive & Energy Support Coal Harbour Pharmacy Vancouver 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