Silymarin, L Glutathione, N Acetyl Cysteine L Carnitine, L Ornithine, Choline With Antioxidants & Micronutrients Tablets Manufacturer Supplier and PCD Pharma Franchise 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 L Carnitine 500 mg with Vitamin B 6 Medicine Center Pharmacy L Carnitine Linus Pauling Institute Oregon State University