When to Take L Carnitine for Optimal Training Benefits Transparent Labs L Carnitine Injection In Reno, NV Aesthetics Medspa L Carnitine injection is recommended at 1 ampule every 2 3 days for best results. The L Carnitine is taken intravenously either by normal injection or using a butterfly needle. After taking this L Carnitine, you L Carnitine Injection, 200 mg at 500 piece in Nagpur ID: 2855249881955 6 Benefits of L Carnitine Injections MedHealth 360 Subgroup analysis by L carnitine dose. Download Scientific Diagram