Levocarnitine Injection: Package Insert Prescribing Info Injectable L Carnitine > Oral L Carnitine BUT do you REALLY need it?, , I dont think so., , L Carnitine is a medicine often prescribed by doctors to patients with heart issues., , In theory, it L Carnitine Injection vs. Oral Supplements: Which is More Effective? Katalyst Wellness L carnitine is an amino acid derivative that plays a crucial role in the bodys energy production processes. As an injectable supplement, L carnitine has been employed to support various health