L Carnitine Injection Levocarnitine IV L carnitine, ., ., ., Disclaimer: I do NOT encourage the use of steroids or substances not approved for human use., Always consult a medical professional before considering any enhancement protocol. Did you know L carnitine, a vital amino acid, is naturally produced by your body and found in various foods? While acetyl L carnitine (ALCAR) can be a beneficial supplement for some, most people get Carnitine Deficiency: What Is It, Causes, Symptoms, and More Osmosis