Injectable carnitine vs oral version comparison? L Carnitine Injection Clinica IDEAL Harwin Full article: l Carnitine conjugated chitosan stearic acid polymeric micelles for improving the oral bioavailability of paclitaxel Pharmacokinetics of L Carnitine Clinical Pharmacokinetics Springer Nature Link L Carnitine is often marketed as a fat burner, but most people dont realize that oral and injectable L Carnitine are not the same..Oral L Carnitine has poor absorption (only 20% bioavailability),