Carnitine: the claims and why it may not work Kinetics, Pharmacokinetics, and Regulation of lCarnitine and Acetyll carnitine Metabolism REBOUCHE 2004 Annals of the New York Academy of Sciences Wiley Online Library 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 The bright and the dark sides of L carnitine supplementation: a systematic review Journal of the International Society of Sports Nutrition Springer Nature Link Injectable vs Oral L Carnitine: Which Works Better? AWP L carnitine is effective for both fat loss and athletic performance. However, oral L carnitine has lower bioavailability and can be harmful at high doses, so it should be avoided. , Even cardiologists