L Carnitine Injection Levocarnitine IV Injectable vs Oral L Carnitine: Which Works Better? AWP Injectable L Carnitine 500mg ml (20ml) : Amazon.ca: Health & Personal Care L CARNITINE Why we chose to bring this injection on it pairs GREAT with our weight loss program, is a stellar stand alone injection, and is absorbed much more effectively as injection. AND, 6 Benefits of L Carnitine Injections MedHealth 360 Frontiers Dietary supplementation with L carnitine elevates intracellular carnitine levels and affects gene expression of SLC25A20 and COX4I1, as well as non mitochondrial respiration of bovine blood cells during systemic immune challenge