L Carnitine Injection vs. Oral Supplements: Which is More Effective? Katalyst Wellness L Carnitina Para Qu Sirve? Beneficios Y Usos Bupa Latinoamrica L Carnitina: Beneficios y Contraindicaciones L carnitina: qu es y para qu sirve 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), Injectable vs Oral L Carnitine: Which Works Better? AWP